I love it too- I wish my greys were at the point where we could have these fun conversations too.
So far, Lyric says a clickie sound that I interpretted to mean "Cup". So, if I show him a cup he says it. But, if I show him something else and ask what it is, he says cup too. We're working on it.
Sadie Grey still says "pretty birdie" and also Lyric's interpretation of cup- said just like he says it. She hasn't learned anything new besides that. It makes me wonder what I'm doing wrong and why my birds are not great talkers... don't get me wrong, I love them regardless, but I would be so beside myself if they could have conversations like some of yours do.