[ServiceContract] public interface IModelAgencyService { [OperationContract] IEnumerable<ReservationDTO> GetReservations(); [OperationContract] void InsertReservation(ReservationDTO reservation); [OperationContract] void UpdateReservation(ReservationDTO reservation); [OperationContract] void DeleteReservation(int reservationId); [OperationContract] ReservationDTO GetReservation(int reservationId); }