If a passenger wants to change their reservation to a flight with a different airline， you should：

If a passenger wants to change their reservation to a flight with a different airline， you should：
A.Tell them it's not allowed.
B.Explain the process of canceling the current reservation and booking with the other airline.
C.Do it for them without any explanation.
D.Charge them a high fee without notice.
正确答案：B
试题解析：乘客想要更改到其他航空公司的航班，客服应向其解释取消当前预订并预订其他航空公司航班的流程。