public HttpResponseMessage Put(int id, [FromBody] Traveler traveler)
        {
            // returning 404 if the entity doesn't exist
            if (Travelers.GetSingle(id) == null)
            {
                return(Request.CreateResponse(HttpStatusCode.NotFound));
            }

            Travelers.Edit(traveler);
            Travelers.Save();
            return(Request.CreateResponse(HttpStatusCode.OK));
        }
        public HttpResponseMessage Delete(int id)
        {
            var reservation = Travelers.GetSingle(id);

            // returning 404 if the entity doesn't exist
            if (reservation == null)
            {
                return(Request.CreateResponse(HttpStatusCode.NotFound));
            }

            Travelers.Delete(reservation);
            Travelers.Save();
            return(Request.CreateResponse(HttpStatusCode.OK));
        }