private static string MakeMessage(MovieReservation reservation)
 {
     if (reservation.ProviderName == "Netflix")
     {
         return string.Format("{0} on {1} was added to your Netflix Queue", reservation.Title, reservation.Format);
     }
     return string.Format("{0} on {1} is waiting for you at Redbox", reservation.Title, reservation.Format);
 }
 // POST /api/reservations
 public HttpResponseMessage<MovieReservationResult> PostReservation(MovieReservation reservation)
 {
     return new HttpResponseMessage<MovieReservationResult>(new MovieReservationResult { ConfirmationMessage = MakeMessage(reservation) }, HttpStatusCode.OK);
 }