W: Hello.M: Hello, is this John Smith’s homeW: Yes, it is, but he is out right now. Would you like to leave a messageM: Well, I really don’t know what I should do. I can’t ask him to call me back because I’m calling from a friend’s.W: Well, then, why don’t you try his office I think he’s there now.M: Yes, I guess I could do that.W: Would you like to have the numberM: That would be very kind of you.W: His office number is 11123345. You can reach John there.M: Thank you so much for your help.W: You’re welcome. Goodbye and good luck. Why can’t the man ask John to call him back（）