Mebuat dialog expressions of anger and annoyence

A = Hey, What did you say to the other friends?
B = What did I say?
A = Don't pretend that you don't know. I heard that you spread a gossip that I was cheating during the test! It's really annoying.
B = Ah, I think that's true, Everyone knows that you always got a standart score. And now, you got a perfect score. You know, perfect score!
A = Hey, Don't just make a conclusion like that! I was studying a whole night and I tried my best.
B = Really? I'm sorry. It was my mistake. I just make a conclusion like that without thinking about you.
A = Okay, I accept your apology but Don't do it again! It makes me angry.
B = Okay, I will. From now, I should think positively about this matter.