public HttpResponseMessage PostAirplane([FromBody] AIRPLANE plane)
        {
            try
            {
                using (TECAirlinesDBEntities entities = new TECAirlinesDBEntities())
                {
                    entities.INSERT_AIRPLANE(plane.AIRPLANE_ID, plane.PILOT_ID);
                    entities.SaveChanges();

                    var message = Request.CreateResponse(HttpStatusCode.Created, plane);
                    message.Headers.Location = new Uri(Request.RequestUri + plane.AIRPLANE_ID.ToString());
                    return message;
                }
            }
            catch (Exception ex)
            {
                return Request.CreateErrorResponse(HttpStatusCode.BadRequest, ex);
            }
        }