B: Okay.

A: Can I get to Boston before five?

B: Sure, you can.

A: Can you imagine?

B: No, I can't.

A: Can we talk for a second?

B: Sure. Is there something wrong?

A:  Well, sort of . Yes.

A: How can I make it up to you?

B: I don't think you can.

A: Can I borrow your jacket?

B:  Sure. Which one?

A: I can't seem to reach him.

B: Try again in half an hour.

A: Can't you take a little joke?

B: It's no joke.

A: Can I change our schedule for tomorrow?

B: No, it's too late now.