// GET: Reservations/Details/5
        public async Task <ActionResult> Details(Guid?id)
        {
            if (!id.HasValue)
            {
                return(new HttpStatusCodeResult(HttpStatusCode.BadRequest));
            }

            var reservation = await _reservationService.GetByReservationIdAsync(id.Value);

            if (reservation == null)
            {
                return(HttpNotFound());
            }

            return(View(reservation));
        }