对不起，我想更改一下我订的票。

I'm sorry. I'd like to change my reservation.

youdao

如果可能的话，我想更改一下我预订的机票。

I'd like to change my reservation if possible.

youdao

我刚刚得知明天必须出差。我想更改我们的会面时间。

I just learned I have to go on a business trip tomorrow. I'd like to change our appointment time.

youdao

By the way, I want to emphasize that I've named these constants to make it easier to change.

顺便说一下，我想要强调,我给这些常数命名是为了更方便之后更改。

麻省理工公开课 - 计算机科学及编程导论课程节选