/// <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));
        }