public ActionResult DisplayDetails()
        {
            var flights = flightManager.DisplaySystemDetails();

            if (flights.Count() > 0)
            {
                List <SystemDetailsViewModel> model = new List <SystemDetailsViewModel>();

                foreach (var item in flights)
                {
                    model.Add(new SystemDetailsViewModel
                    {
                        AirlineName       = item.AirlineName,
                        Origin            = item.Origin,
                        Destination       = item.Destination,
                        FlightId          = item.FlightId,
                        FlightSectionName = item.FlightSectionName,
                        Row     = item.Row,
                        Column  = item.Column,
                        IsTaken = item.IsTaken
                    });
                }
                return(View(model));
            }

            return(View());
        }