Shoutbox

well... i guess i have another question
i already made something that if somebody says anything, my scripts says: "i'm away, talk to me later" but how do i make it like if he says "hi", my pc says "hello" and if he ask "how are you?" my script automatically says "fine" (just some examples)
so what code do i need to use that he check if what he says is something i programmed? like the pokemsn or battle does with
"-use (attack)" or "-heal"...

debeste95