说明：  软件工程实验报告 机票预订系统 旅客可向该系统查询航班情况 旅行社把预定机票的旅客信息输入该系统，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
(Software engineering lab report ticket reservation system flight passengers check the situation to the system, travel agents to book air tickets of passenger information into the system, the system arranged flights for passengers to print tickets notices and bills, passengers received tickets in the notification and billing Contributions of the aircraft after take-off tickets 24 hours prior notice and payment with a single correct by the system after the proofing printer ticket to the travelers. Visitors can also make refund requests to the system, the system-specific terms and fee refund after the appropriate treatment)