How do you do?

你好。

Nice to meet you.

很高兴见到你。

Glad to see you.

认识你很高兴。

How do you do? My name's Lin Qing.

你好，我叫林清。

Excuse me. I don't think we've met before.

你好，我们以前可能见过面。

Hello! You must be Mary. I'm John.

你好，你一定是玛莉，我叫约翰。

It's very nice to have a chance to meet you.

真高兴能有这个机会认识你。

You look familiar¹.

你看上去很面熟。

Don't I know you?

你不认识我吗?

Don't I know you from somewhere?

我们是不是在哪儿见过面?

I know you, but I forgot your name.

我认识你，可是我忘了你叫什么名字。

What's your name again?

你叫什么来着?

I'm not sure. Maybe.

我不敢肯定，也许在哪儿见过。