为方便旅客，某航空公司拟开发一个机票预定系统。旅客可向该系统查询航班情况（按目的地、起飞时间、航班班次等）。旅行社把预定机票的旅客信息（姓名、性别、工作单位、身份证号码、旅行时间、旅行目的地等）输入该系统，系统为旅客安排航班，打印取票通知和帐单，旅客在收到取票通知和帐单后可交费并于飞机起飞前24小时凭取票通知和交款单经系统校对无误后打印机票给旅客。旅客也可向系统提出退票要求，系统针对具体情况计算手续费后进行相应退票处理。-The convenience of visitors, the development of a ticket reservation system. Visitors can check flight status to the system (by destination, departure time, flight frequency, etc.). Travel agents to book tickets for passenger information (name, sex, work, identity card number, travel time, travel destinations, etc.) entered into the system, the system arrange flights for passengers to print tickets notices and bills, to take passengers received vote after notice and billing and payment 24 hours before the aircraft took off with a single ticket notification and payment by the system after the printer proofread and correct ticket to the travelers. Visitors can also make a refund to the system requirements, the system for calculating the specific circumstances of the appropriate fee refund after the treatment.