Shoutbox

I am not sure if get this right?.. but U want it to respond to something when the other contact says the word, not when U type the word.. am I right?.. if yes then I don't think this is possible by using plugins, then U would have to do some other stuff... but I think i'm going to put this into my project... .. but if this is not what U want, but U want to it to insert another word/sentece when U type bored! or something then that should be possible with plugin/stuff-plug...