Mary is not available at the moment.

Mary现在没空接电话

Oh. I'm sorry.

噢，对不起。

That's fine. I'll await his return call.

很好。我会等他的来电。

Good morning. This is Huang Feng.

早上好，我叫黄凤。

Hello, my name is Susan and I am calling to confirm my reservation.

喂，你好，我叫苏珊，我大电话确定我的预定。

Why not?

为什么不能？