1. Sorry, I'm really sorry.
2. Excuse me， I'll be right back.
3. Please accept my apology.
4. How could I be so thoughtless?
5. I'll never forgive myself.
6. How can I make it up to you?
7. A: Ouch!
B: Oh, I beg your pardon.
8. A: I'm sorry if I've caused any problem.
B: No, no problem at all.
9. A: It's my fault. Anyway I want to pay for cleaning the carpet.
B: It's no big deal.
10. I hope you will excuse me.
11. Don't take it to heart. What is done is done.
12. Sorry to have bothered you when you are on the phone.
13. It's alright. I will do so if I am in your situation.
14. Are you kidding？
15. Trust me! I am willing to compensate you for it.
