public void AddPassengerToReservation(int referenceNumber, Passenger p)
 {
     passengerRepository.SaveOrUpdate(p);
     bookingRepository.AddPassengerToReservation(referenceNumber, p.passport_number);
 }
 partial void UpdatePassenger(Passenger instance);
 partial void DeletePassenger(Passenger instance);
 partial void InsertPassenger(Passenger instance);