you just talk. but your replies have to be questions.
INVALID questions:
why?
what?
when?
where?
you can't use these unless you add something more :]
example:
Oppa: Don't you love trot?
Bebe: Isn't that a bit overrated?
Tabi: Wouldn't it be overrated to call trot overrated?
xD
so are you ready to play?^^