No, He is not available。
No, He just went out, he will be back in 30 minutes。
如果他要找的人不在：
Do you know when he will be back?
Do you know where he is going?
Do you know where I can reach him?
Do you know his office number? (or work place number)
回答：
No, I am sorry, I don know! (50%)
I have no idea. (49%)
Yes, his number is 404-123-4567.
如果要留言：
May I leave a message?
回答：
Sure, go ahead。
Hold on, let me get a pencil and paper。
打错电话：
Is this Wachovia Bank?
回答：
No, I am afraid you have the wrong number。
What number did you dial?
What number are you calling?
结束对话：
Thank you, have a good day。
听不清楚时：
Pardon?
Excuse me?
I am sorry?
Say again?
Say what?
Come again?
