¶1Leigh Beth Stubblefield appeals from a judgment of sentence entered in the Court of Common Pleas of Allegheny County. We affirm.
¶2Leigh Beth Stubblefield was arrested and charged with violating the Controlled Substance, Drug, Device and Cosmetic Act: Possession with Intent to Deliver (cocaine)
¶3On February 10, 1989 Agent Lawrence R. Shoup of the Pennsylvania Attorney General’s Bureau of Narcotics Investigation, and Detectives Dean Kaminski and James Hasara of the Allegheny County Police were working at Pittsburgh International Airport as part of a drug interdiction team. As the three detectives were observing travelers disembarking from a flight from Philadelphia, they noticed a black male, later identified as Bruce Harvin, exit the *432plane. Agent Shoup testified that the only thing unusual about Harvin at that point was that he was wearing dark sunglasses inside the airport on an overcast day. A black female, later identified as Stubblefield, exited the plane behind him. Stubblefield was walking behind Harvin at a distance of approximately 15 to 20 feet. As the detectives watched all the passengers walk through the corridor, Agent Shoup heard Harvin call out to Stubblefield. Stubblefield had turned into a dead end corridor and Harvin, who was walking ahead, stopped, turned, and said, “Miss, Miss, I think it’s up this way.” Stubblefield did not verbally respond, but again started following Harvin at a distance of approximately 10 to 15 feet.
¶4At this point Agent Shoup decided that something was strange in the manner in which Stubblefield and Harvin were conducting themselves and he mentioned his observation to Detectives Kaminski and Hasara. The detectives agreed, and the three of them began following Harvin and Stubblefield for further observation. Shortly ahead the corridor divided. Harvin stopped and Stubblefield caught up to him. They talked briefly. Then Harvin went into the men’s restroom and Stubblefield began walking towards the exit. Detective Hasara remained to continue surveillance of Harvin while Agent Shoup and Detective Kaminski followed Stubblefield past an airport security checkpoint.
¶5Immediately past the security checkpoint Agent Shoup and Detective Kaminski approached Stubblefield, identified themselves and asked to speak with her. She agreed. Agent Shoup asked about her flight itinerary and Stubble-field responded that the flight had arrived from Florida with a connection in Philadelphia. However, when asked, Stubblefield could not recall the name of the city she had visited in Florida. Although she had arrived in Florida on February 9, the previous day, ostensibly to visit her boyr friend, Bruce, Stubblefield did not know her boyfriend’s last name. She did admit that he was the man who called her “Miss” in the airport corridor and had later stopped to talk with her. When asked if she had her airline ticket, without *433even checking her purse or pockets, Stubblefield immediately stated that she had lost it. In response to Agent Shoup’s inquiries about her luggage she said that she had also lost that. Agent Shoup next suggested that they move to the vacant British Airways counter nearby which was away from the pedestrian traffic. Stubblefield followed Agent Shoup over to the counter.
¶6At the ticket counter Shoup asked Stubblefield for identification. She produced a voter’s registration card, a welfare card and a Pennsylvania driver’s learner’s permit — all of which identified her as Leigh Beth Stubblefield. Agent Shoup returned the identification to her and asked her to sign a consent-to-search form. He showed her the form which he carried as part of his work on the drug interdiction team. Stubblefield looked over the form and answered “Well, if I don’t have to, I’d rather not.” Agent Shoup testified that he responded “Okay. You don’t have to. That’s right.” Stubblefield then told Shoup that she wanted to locate her luggage and her boyfriend, Bruce. Shoup informed her that the baggage claim was located downstairs and added, “If you want, we could walk down that way.” Stubblefield did not object. The two of them made their way to the baggage claim area where the following exchange took place:
Stubblefield: Well, I have to go to the bathroom.
Shoup: Oh, you do.
Stubblefield: Yeah. Do you have a lady or someone to go in there with me?
Shoup: Okay. We can do that.
¶7Agent Shoup enlisted the aid of two female security officers who accompanied Stubblefield into the restroom. Later, in the corridor, one of the security officers, Pat Remaley, told Agent Shoup that as Stubblefield was using the restroom facilities, it appeared as if she was trying to conceal something on her person. Upon hearing this Agent Shoup approached Stubblefield, who was with Detective Kaminski, and requested that she accompany him to the police office in the airport. Stubblefield agreed. In the *434police office Agent Shoup asked Stubblefield for permission to allow a female security officer to conduct a search of her person and her baggage. Stubblefield refused. Shoup requested that she wait while he typed a search warrant to present before a district justice. Stubblefield agreed and Shoup permitted her to make some phone calls while she waited. Shoup testified that he never indicated to Stubble-field that she was not free to leave at any time.
¶8Detective Kaminski, who had left the office to locate Detective Hasara, returned and informed Shoup that Detective Hasara had questioned Harvin. Harvin had denied traveling with Stubblefield. Stubblefield indicated that she wanted to speak privately with Agent Shoup. Agent Shoup told her that Police Officer Justine Start, who had replaced the female security officers, would have to remain. Stubblefield responded, “I think I got what you want.” Shoup immediately read her the Miranda
¶9On appeal Stubblefield presents two issues for our review:
(1) Was the Appellant illegally detained and seized by the officers during an airport stop without sufficient information to support a finding of reasonable suspicion or probable cause to arrest.
(2) The Pennsylvania Constitution requires that investigating agents advise individuals who are the subject of airport investigatory stops/detentions that those persons have the right to refuse to speak or to consent to a search and/or to accompany the agents.
¶10Regarding our standard of review, the Supreme Court of Pennsylvania in Commonwealth v. Cortez, 507 Pa. 529, 491 A.2d 111 (1985), cert denied, 474 U.S. 950, 106 S.Ct. 349, 88 L.Ed.2d 297 (1985), stated:
When we review the ruling of a suppression court we must determine whether the factual findings are supported by the record. When it is a defendant who has appealed, we must consider only the evidence of the prosecution and so much of the evidence of the defense as, fairly read in the context of the record as a whole, remains uncontradicted. Assuming that there is support in the record, we are bound by the facts as are found and we may reverse the suppression court only if the legal conclusions drawn from those facts are in error.
¶11507 Pa. at 532, 491 A.2d at 112 (emphasis added). The determination of whether probable cause or reasonable suspicion of criminal activity exists is a legal conclusion to be drawn from the facts as found by the suppression court. See Beck v. Ohio, 379 U.S. 89, 85 S.Ct. 223, 13 L.Ed.2d 142 (1964).
¶12The Fourth Amendment to the United States Constitution and Article 1, § 8 of the Pennsylvania Constitution guarantee the right of individuals to be protected from unlawful governmental searches and seizures. The United *436States Supreme Court in Michigan v. Chesternut, 486 U.S. 567, 108 S.Ct. 1975, 100 L.Ed.2d 565 (1988), quoting Terry v. Ohio, 392 U.S. 1, 88 S.Ct. 1868, 20 L.Ed.2d 889 (1968), explained that not all interactions between the police and citizens involve seizures of persons. Only when the police have restrained the liberty of a person by a show of authority or physical force may we conclude that a seizure has occurred. 486 U.S. at 573, 108 S.Ct. at 1979. An evaluation as to whether a seizure has occurred must be viewed in light of all the circumstances and whether a reasonable person in those circumstances would have believed he or she was free to leave. 486 U.S. at 572, 108 S.Ct. at 1978.
¶13A close reading of the record establishes that Stubblefield was not illegally detained and, as such, there was no seizure of her person in the present case. The police identified themselves and requested to speak to Stubblefield in the airport corridor, a public place. She voluntarily answered their questions. There is no evidence that she was restrained by either a show of authority or physical force. Thus, there was no seizure of her person during the preliminary encounter. See Commonwealth v. Lidge, 399 Pa.Super. 360, 582 A.2d 383 (1990).
¶14In Commonwealth v. Douglass, 372 Pa.Super. 227, 539 A.2d 412 (1986), allocatur denied, 520 Pa. 595, 552 A.2d 250 (1988), this court described the circumstances under which an individual is required to respond to questions posed by police.
A police encounter with a suspect may be properly characterized as a mere encounter, an investigative detention, a custodial detention, or a formal arrest. A “mere encounter” (or request for information) need not be supported by any level of suspicion, but it carries no official compulsion to stop or respond. An “investigative detention” must be supported by reasonable suspicion; it subjects the suspect to a stop and a period of detention, but *437does not involve such coercive conditions as to constitute the functional equivalent of arrest, (citations omitted).
¶15372 Pa.Super. at 238-39, 539 A.2d at 417-18.
¶16When Agent Shoup approached Stubblefield and inquired about her flight in a conversational tone it was a mere encounter. Agent Shoup was requesting information and Stubblefield was under no obligation to stop or respond. Id.The incident with the police at the airport began as a mere encounter and evolved into an investigative detention based upon the detectives’ reasonable suspicions of criminal activity. Id.During the initial encounter between the police and Stubblefield the police were not required to possess a reasonable suspicion that Stubblefield had committed a crime in order to question her. Id.“[L]aw enforcement officers do not violate the Fourth Amendment by merely approaching an individual ... in [a] public place, by asking him if he is willing to answer some questions, by putting questions to him if the person is willing to listen ...” Florida v. Royer, 460 U.S. 491, 497, 103 S.Ct. 1319, 1323, 75 L.Ed.2d 229 (1983). During the consensual questioning of Stubblefield in the airport corridor the police became reasonably suspicious of criminal activity as the result of her responses. When Agent Shoup directed Stubblefield over to the ticket counter for further questioning as a result of his reasonable suspicions the mere encounter developed into an investigative stop or detention. Douglass, supra.
¶17In order to evaluate the validity of an investigative stop or detention we must first determine whether the law enforcement officials’ actions were justified from the beginning. To be justified the officials must have had reasonable suspicion that a crime had been, or was about to be, committed. “Reasonable suspicion, like probable cause, is dependent upon both the content of information possessed by police and its degree of reliability. Both factors— quantity and quality — are considered in the ‘totality of the circumstances — the whole picture,’ that must be taken into account when evaluating whether there is reasonable suspi*438cion.” (citations omitted). Alabama v. White, 496 U.S. 325, 330, 110 S.Ct. 2412, 2416, 110 L.Ed.2d 301, 309 (1990).
¶18Agent Shoup has been in narcotics investigations for approximately seven years. Through his professional experience as a member of the drug interdiction team he has become familiar with certain patterns of behavior often associated with illicit drug activity. Shoup learned upon questioning Stubblefield that she had lost both her airline ticket and her luggage, that she was unaware of her location while in Florida, and that she did not know her boyfriend and traveling companion’s last name. In addition, it appeared to the members of the drug interdiction team that Harvin and Stubblefield were attempting to conceal the fact that they were traveling together. Finally, Stubblefield’s brief stay in Florida, a source city, is consistent with the drug courier profile.
¶19Stubblefield next argues that the Pennsylvania Constitution requires law enforcement officials to affirmatively advise any suspect who is the subject of an airport investigatory stop or detention that he or she is not required to cooperate and may refuse to speak with them. She further argues that officials who fail to do so, such as Agent Shoup, risk having the incident viewed as an illegal detention. This contention has no merit. Stubblefield’s initial encounter with the police was a mere encounter, Douglass, supra,and did not require the police to inform her that she did not have to cooperate. The record reveals that Agent Shoup and the detectives never indicated in any manner that Stubblefield was not free to terminate the questioning and vacate the area.
¶20Moreover, when the mere encounter yielded sufficient reasonable suspicion to justify an investigative stop, Agent Shoup promptly requested that Stubblefield sign a consent to search form, but she stated that she really did not want to sign it. Agent Shoup also informed Stubblefield that she did not have to sign the consent to search form. We reiterate what this court stated in an earlier decision:
... it must be recognized that the Commonwealth need not demonstrate that the consenter was aware of his right to refuse consent [to a search].
¶21*440Commonwealth v. Woods, 240 Pa.Super. 72, 76, 368 A.2d 304 (1976) (emphasis added).
¶22We conclude, therefore, in light of the foregoing that Stubblefield was not illegally detained and that the police were under no obligation to affirmatively inform her that she had a right not to cooperate.
¶23We affirm the judgment of sentence.
¶24. 35 Pa.S. § 780-113(a)(30).
¶25. 18 Pa.C.S. 903(a)(1).
¶26. The trial court sustained Defendant's demurrer to the charge of criminal conspiracy.
¶27. The fine was imposed pursuant to 18 Pa.C.S. § 7508.
¶28. Miranda v. Arizona, 384 U.S. 436, 86 S.Ct. 1602, 16 L.Ed.2d 694 (1966).
¶29. This court considered the propriety of an investigatory stop of an individual on the driveway of his private residence in Commonwealth v. Ogborne, 384 Pa.Super. 604, 559 A.2d 931 (1989) (Tamilia, J., dissenting), reargument denied, July 10, 1989. Although our supreme court initially granted allocatur, Commonwealth v. Ogborne, 524 Pa. 626, 574 A.2d 68 (1990), the appeal was later dismissed as improvidently granted, Commonwealth v. Ogborne, 525 Pa. 570, 583 A.2d 789 (1991). The United States Supreme Court granted certiorari, vacated judgment, and remanded to our court for further consideration in light of Alabama v. White, 496 U.S. 325, 110 S.Ct. 2412, 110 L.Ed.2d 301 (1990). The panel (Cavanaugh, Tamilia and Popovich, JJ.) filed its revised opinion on October 21, 1991, affirming the judgment of sentence (Popovich, J. dissenting).
¶30In Ogbome, based on a tip from a reliable informant, the police conducted an investigatory stop of an individual in his private driveway. The appellant was known to the police to deal in drugs, and the informant described the car appellant would be driving, his destination, his approximate time of arrival and the type and approximate quantity of drugs he would be carrying.- In short, the informant, whose veracity was known to the police, detailed future activity not generally known to the public, as required by Alabama v. White, supra. This court found the totality of circumstances in Ogbome, which provided the officers with reasonable suspicion to conduct the investigatory stop, to be similar to those in White, and affirmed the conviction on that basis.
¶31. The drug courier profile, developed by Drug Enforcement Administrator Special Agent Paul Markonni, is used to determine whether a particular traveler shows traits or characteristics common to drug traffickers. The profile traits can in certain circumstances be used to *439support a finding of reasonable suspicion. United States v. Sokolow, 490 U.S. 1, 109 S.Ct. 1581, 104 L.Ed.2d 1 (1989).