How about going to the theatre?

Aren't you going to your aerobics class?

Are you going out?

Oh no. I'm going to be late. Tim'll already be at the theatre by now.

I'm afraid something's come up and I've got to deal with it.

This is the third time he's done something like this.

Well, it'll be better than waiting for Tim!

Would you mind going on your own and I'll meet you there.

Well, I'm fed up with it, Tim, and I'm not going to put up with it any more.