飞机订票系统，可实现输入航班信息，输出航班信息，保存航班信息，读取航班信息，查找航班信息，删除航班信息及订票退票等功能。-Aircraft booking systems, flight information can be input, output flight information, save flight information, read the flight information, to find flight information, delete information and booking flights refund functions.