According to the customer different request , provides the preferential benefit airplane ticket and each kind ofhotel for the various countries ' friend orders the service , lets thecustomer spend the least money , enjoys most comfortable going on ajourney with the lodgings condition 根据客户不同要求，为各国友人提供优惠机票及各类酒店的预订服务，让顾客花最少的钱，享受最舒适的出行和住宿条件。
The booking service interacting with the pricing strategy and seat allocation strategy would need the implementations of those strategies that were current at the time of making a booking , not the versions that were current when the booking service itself was first instantiated 与报价策略和座位分配策略互动的预订服务需要的策略实现，应当是预订时的实现，而不是预订服务第一次初始化的时候实现的版本。
