航空订票系统，该系统能实现的操作和功能

　　　1）查询航线：根据客户提出的终点站名输出如下信息：航班号、飞机号、星期几飞行，最近一天航班的日期和余票额；

　　　2）承办订票业务：根据客户提出的要求（航班号、订票数额）查询该航班票额情况，若有余票，则为客户办理订票手续，输出座位号；若已满员或余票少余订票额，则需重新询问客户要求。若需要，可登记排队候补；

　　　3）承办退票业务：根据客户提出的情况（日期、航班号），为客户办理退票手续，然后查询该航班是否有人排队候补，首先询问排在第一的客户，若所退票额能满足他的要求，则为他办理订票手续，否则依次询问其它排队候的客户。-Airline reservation systems, the operation and function of the system to achieve 1) query route: output the following information: flight number, aircraft number, weekday flight according to the terminus of the name of the customer, the last day the date and the remainder of the flight ticket amount　2) contractor booking business if full members or votes remaining little more than booking: according to the customer' s requirements (flight number, booking amount) query the flight definitive, if more than votes, compared to go through the booking procedures, output seat number　amount, you need to re-ask the customer requirements. If necessary, may be registered queuing alternate　3) the contractor refund business: According to the customer (date, flight number), should seek refunds for customers, and then check the flight whether people queuing alternate first asks customers If the refund amount to meet his demands, if he go through the booking procedures, otherwise turn to ask the