ally amenable to process in that state must inevitably be made on an ad hoc case-by-case basis and not by the application of a mechanical rule. Campbell v. Triangle Corp., 336 F.Supp. 1002 (E.D.Pa.1972).” Proctor & Schwartz, Inc. v. Cleveland Lumber Co., supra, 228 Pa.Super. at 18, 323 A.2d at 15. See also Kitzinger v. Gimbel Brothers, Inc. v. Textile Alliance Ltd., supra; Action Industries, Inc. v. Wiedeman, 236 Pa.Super. 447, 346 A.2d 798 (1975). However, we have developed certain guidelines for determining whether “minimum contacts” are present in a given case. “First, the defendant must have purposefully availed itself of the privilege of acting within the forum state thus invoking the benefits and protections of its laws. Hanson v. Denckla, supra. Secondly, the cause of action must arise from defendant’s activities within the forum state. See Southern Mach. Co. v. Mohasco Indus., Inc., 401 F.2d 374 (6th Cir. 1968); Electric Regulator Corp. v. Sterling Extruder Corp., 280 F.Supp. 550 (D.Conn.1968). Lastly, the acts of the defendant must have a substantial enough connection with the forum state to make the exercise of jurisdiction over it reasonable. International Shoe Co. v. Washington, supra; see Southern Mach. Co. v. Mohasco Indus., Inc., supra; see also In-Flight Devices Corp. v. Van Dusen Air, Inc., 466 F.2d 220 (6th Cir. 1972); Kourkene v. American BBR, Inc., 313 F.2d 769 (9th Cir. 1963).” Proctor & Schwartz, supra, 228 Pa.Super. at 19, 323 A.2d at 15; accord Kitzinger v. Gimbel Brothers, Inc. v. Textile Alliance Ltd., supra; Action Industries, supra. See also Trachtman v. T.M.S. Realty and Financial Services, 393 F.Supp. 1342 (E.D.Pa.1975).
The second test requires that the cause of action arise from the defendant-corporation’s activities within the forum state. In .the instant case, the record shows that appellant advertised in a Philadelphia newspaper, that it had arrangements with Philadelphia travel agents, and that it maintained a toll-free telephone number for Philadelphia area residents to make reservations. However, the record gives no indication whatsoever that appellee read the newspaper ads, booked reservations through a Philadelphia travel agen