private void btnSave_Click(object sender, EventArgs e)
        {
            AvailibleBookingTime abt = new AvailibleBookingTime(a.Id, dateFrom.Value, dateTo.Value);

            AvailibleBookingTimeDAO.Update(abt);
            MessageBox.Show("Successfuly updated!");
        }
        private void LoadData()
        {
            AvailibleBookingTime abt = AvailibleBookingTimeDAO.GetLatestDate();

            dateFrom.Value = abt.From;
            dateTo.Value   = abt.To;
        }