B:Is that a non-smoking room?

是无烟房间吗？

I requested a no smoking room.

我想要一个新房间。

A non-smoking room please.

请给我一间无烟房间。

Please give me a no-smoking room.

请给我一个禁烟房。

You can smoke in the smoking room.

你可以在吸烟室抽烟。