If a passenger wants to change the date of their reservation， you would ask：

If a passenger wants to change the date of their reservation， you would ask：
A.What's your favorite color？
B.Which date would you like to change to？
C.Why do you want to change the date？
D.Do you have a credit card？
正确答案：B
试题解析：直接询问乘客想更改的日期，能有效推进服务流程。