B: Don't worry about it.

　　A: Anyway I want to pay for the cleaning.

　　B: It's no big deal.

　　A: I have been waiting for Mr. T. Carpenter for thirty minutes.

　　B: I'm sorry, but he's still in a meeting.

　　A: Well, how much longer do you think he will be?

　　B: Oh, he should be finished soon.

　　A: I'm sorry I got angry at you at the party.

　　B: That's too bad. Everyone will be disappointed.

　　A: I'm sorry if I've caused any problem.

　　B: No, no problem at all.

　　A: I'm sorry I'm late. Have you been waiting long?

　　B: No, I just got here.

　　A: Oh, I'm terribly sorry, sir. Are you all right?

　　B: I'm all right. Don't worry.

　　A: Ouch!

　　B: Oh, I beg your pardon.