1 A: I'm really sorry I broke your window.
B: It's OK. It was an accident.
2 A: I'm sorry, I didn't mean to sit on your glasses.
B: Forget about it.
3 A: Don't be mad at me, but I forgot to return your book to the library.
B: Relax. It doesn't matter.
4 A: We're going to be late for the film!
It's all my fault.
B: Don't worry about it.
5 A: I'm sorry, I made a mistake and I told you the wrong time.
B: Never mind.