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["关键词"]
["航班"]
["机票"]
["航班预订"]
["订航班"]
["查航班"]
["我要订飞机票"]
["查机票"]
["订机票"]
["今天到北京的航班还有吗"]
["查询机票"]
["航班查询"]
["查询航班"]
["我要订广州到重庆的机票"]
["机票查询"]
["机票预订"]
["5月1号的机票"]
["5月1号从合肥到北京的机票"]
["合肥到北京的机票"]
["5月1号有几个航班飞北京"]