Could I talk to Mr. Brown? 我可以和布朗先生讲话吗？
May I ask who is calling, please? 我可以问是谁打电话找他的吗？
Hang on a moment, please. 请稍等。
I'm sorry. He is not in. 很抱歉。他不在家。
I have to go. 我必须走了。
Thank you for calling. 谢谢你打电话过来。
I'm afraid you've got the wrong number. 恐怕你打错电话号码了。
The line is busy. 线路忙。
There is a lot of background noise here. 这里有很多背景音。
