It was my please.

荣幸之至。

That's reassuring.

真令人安心。

How many days will it take for my mail to reach its destination?

我的信件到达目的地要用几天？

Have you filled in the baggage declaration?

行李申请单填好了吗？

Your room number is 512. Here's your key.

房间号码是512。这是您的钥匙。

I have your bill right here.

您的账单在这里。