Isn't there something you want to do?
Come again!
All right, this is the start of something new. (How vague can I be?)
Come again!
Ping-pong is fun when the weather's good.
Come again!
I bet it's scary to ask.
Come again!
Wayoooow. (I've got nothing useful to say)
Come again!
The persons you've met, you won't ever meet people exactly like them again.
Come again!
Look how awesome this is!
Come again!