Please check this dialogue

Hi teachers. Please check if this dialogue is natural. And please make changes that would improve it.

A: Hi. Your mom let me in. How was your day?

B: What do you want?

A: I just wanted to check out your paintings.

B: What do you think?

A: I'm not sure. But not bad.

B: So is that all you wanted?

A: No, I guess I was also curious to know where it went wrong between us, since you don't want to talk to me anymore. I just didn't get an explanation.

B: No?

A: No. So was it something I did (wrong)? Do I need 'wrong' here?

B: No.

A: Then what is it?

B: I can't tell you.