A passenger is trying to change their reservation at the airport counter just before the original flight's departure time. What is the appropriate response？

A passenger is trying to change their reservation at the airport counter just before the original flight's departure time. What is the appropriate response？
A.It's too late， you can't change now.
B.Let me check if there are any last - minute options available for the change， but there may be some restrictions.
C.You should have come earlier.
D.I don't have time to deal with this.
正确答案：B
试题解析：乘客在原航班即将起飞前在机场柜台要求更改预订，虽然时间较晚，但代理人应秉持服务态度。