No, you sound different today.

没有，今天你的声音听起来不一样。

Yes. I'm sorry, but how do you spell your last name, sir?

好的，不过对不起，先生你的姓怎么拼？

We're organizing an informal party, and I'd like you to come.

我们计划组织一个非正式聚会，我想请你参加。

I'd like to make an appointment to discuss a question.

我想约个时间讨论个问题。

No. Thank you.

不用了，谢谢。

How much notice of cancellation is necessary to get my deposit back?

想把定金拿回来，要提前多长时间通知你才行？