What to say when you leave口语练习(2)

A:Everybody! I must go now.
    B:Really? Must you? Have another cup of coffee first!
    A:No, thanks.  If I don't get a move, I'll miss the last bus. Thanks for a wonderful evening.

    B:Think nothing of it. Thanks for coming.  Lovely to see yon again. Drop in again soon, won't you?
    A:Yes. I will... I'll see myself out! Bye!
    B:Mind how you go! Good night!
    A:Night!