A: Oh, excuse me. I just spilled my coffee on your carpet.

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.