public HttpResponseMessage DeleteReservation(long id)
        {
            ReservationPersistenceService reservationPersistenceService = new ReservationPersistenceService();
            bool userExists = false;

            userExists = reservationPersistenceService.DeleteReservation(id);

            HttpResponseMessage response;

            if (userExists)
            {
                response = Request.CreateResponse(HttpStatusCode.OK, "Reservation deleted.");
                return(response);
            }
            else
            {
                response = Request.CreateResponse(HttpStatusCode.NotFound, "Reservation not found.");
                return(response);
            }
        }