What do you say to confirm a successful reservation change with a passenger？

What do you say to confirm a successful reservation change with a passenger？
A.Your reservation has been changed. Here's your new itinerary.
B.I think I changed it.
C.Come back tomorrow to check.
D.I'm not sure if it worked.
正确答案：A
试题解析：向乘客确认预订更改成功，需要明确告知乘客预订已更改，并提供新的行程单。