Rather simple game (I got from 'Whose Line Is It Anyway'). Every comment has to be a question in reply to the person before you.
Person 1: Who are you?
Person 2: Would it matter?
Person 1: Are you being hostile?
Person 2: Would you like me to be?
What game are you playing?
We were playing a game?
Would you be surprised if I said yes?
Why would you even ask a question like that?
Why should I ask a more specific question?
How would that be better?