/// <summary>
/// 一个reservation订单里包含多个booking
/// </summary>
/// <param name="books"></param>
/// <returns>新建的reservation单</returns>
internal IReservation CreateReservation()
{
IReservation reservation = new Reservation();
dbCon.UpdateClock();
return(dbCon.CreateReservation(reservation.ID, 0, 0, ReservationStatus.Canceled));
}