say that again, please

A: I'm taking a day off tomorrow and spend the day in Vegas.
B: Excuse me, will you please say that again?
A: I said, I am going to Vegas.
B: Oh. Have a good time, then.
A: I could go with a friend.
B: I beg your pardon?
A: What I'm trying to say is: you can come with me.
B: Oh. Thanks. That is thoughtful of you. But I have so many things to finish here. Besides, I know you'll be with your family.
A: Okay. Don't say I didn't ask you.
B: It's okay. You go paint the town red.