Hang on, please.

请等一下。

Thank you for your help.

谢谢您的帮助。

I'll be seeing you.

再见 注：是美国人喜欢使用的告别语。

What was that?

你说什么来着？

So I've heard.

我听说是这样。

It should be there at 11:45, but it may be a little late.

应该是11点45分到那里，但也可能稍晚一点。