航空客运系统中面向客户的软件，用以方便客户进行操作，减少系统工作量，比如实现航线查询，订票，以及取消订票等功能的实用软件-Air passenger transport system in the customer-oriented software, to facilitate the customers to operate, reduce system workloads, such as to achieve route queries, booking, and cancellation of booking and other functions of the utility software