// Methods
        private void CreateReservation(object obj)
        {
            CurrentReservation.Guest         = SelectedGuest;
            CurrentReservation.Area          = SelectedArea;
            CurrentReservation.ArrivalStatus = SelectedArrivalStatus;
            CurrentReservation.WantedSeats   = SelectedWantedSeats;
            foreach (var table in SelectedReservedTables)
            {
                CurrentReservation.Tables.Add(table);
            }
            CurrentReservation.TimeIn = SelectedDate.ChangeTime(SelectedTimeIn.Hour, SelectedTimeIn.Minute);
            if (SelectedTimeOut.Hour != 0 && SelectedTimeOut.Minute != 0)
            {
                CurrentReservation.TimeOut = new DateTime();
                CurrentReservation.TimeOut = SelectedDate.ChangeTime(SelectedTimeOut.Hour, SelectedTimeOut.Minute);
            }
            if (!string.IsNullOrEmpty(SelectedGuest.FirstName) || !string.IsNullOrEmpty(SelectedGuest.LastName))
            {
                CurrentReservation.Guest = SelectedGuest;
            }

            string result = CurrentReservation.IsValid();

            if (result == "true")
            {
                SqlConnector conn = new SqlConnector();
                // If guest is not null then insert or update in people table.
                if (CurrentReservation.Guest != null)
                {
                    conn.CreateOrUpdateGuest(CurrentReservation.Guest);
                }
                // Whether guest is null or not does not affect the reservation itself.
                conn.CreateReservation(CurrentReservation);
                MessageBox.Show("Your reservation has been saved!");
                ClearAll();
            }
            else
            {
                MessageBox.Show(result);
            }
        }