To obtain a reservation system in transport facilities for performing continuation, cancellation of reservation, duplication with other reservations, etc., by obtaining reliability information for the reservation from information to be obtained from a railway ticket and referring to the reliability information by a service provider.

The reservation system in transport facilities is provided with a railway ticket issuing system 31 that issues the railway ticket to which an ID number m1 is added, a reservation device 10 in transport facilities that accepts the reservation by specifying a user by the ID number m1 and generates reservation information m2, a reservation relay system 33 that generates a serviceability inquiry m3 for the reservation and generates the reliability information for the reservation and a service reservation system 21 that outputs a serviceability response m4 indicating whether or not service to the reservation is provided.