Unless these responses are part of the gameplay I don't think it is a great idea. You can have a good game with one or two characters and a few objects and you can have a rubbish game with 1000s of characters and objects. Although saying that, some different responses can make things a little fresh. But you don't want the player to get bored and start playing the game of "let's count how many different responses can I get by looking at the floor" cause I know I would do that.
Anyhoo here is some suggestions:
Well what's new?
Pfft
What do you think?
Huh?
Just the usual
It looks fine
Anyhoo here is some suggestions:
Well what's new?
Pfft
What do you think?
Huh?
Just the usual
It looks fine