Mary is not available at the moment.

Mary现在没空接电话

You must have the wrong number.

你一定打错电话了。

Oh, she has an opening tomorrow at ten.

哦，她明天上午10点有空。

May I have your name and number, please?

请问你的姓名和电话号码？

OK.

好的。

Will you be so kind as to help me out of the difficulty?

帮助我克服困难，好吗？