gostaria de saber se tem algo errado neste diálogo

b - hey, what's up?
p - hi.
b - how are you doing?
p - not bad.
b - what happened?
p - nothing much at all. and you? how's it going?
b - great! couldn't be better, thanks!
p - ok, I need to go.
b - oh, bye-bye.
p - bye.