Мне нужно составить диалог,тема: два друга встретились в торговом центре начали беседовать и один пригласил другого в кафе посидеть поговорить,и у них завязался спор(один друг любит дешевую одежду и считает что она качественее,другой любит выбирать дорогие вещи и считает что они на много лучше дешевых) заранее !

пусть одного зовут Sam, a другого Fred

Sam: Hey, Fred!

Fred: hey, what's up, Sam?

Sam: How are you doing?

Fred: well, not really good. 

Sam: why's that?

Fred: that's a long story

Sam: then why don't we go to the cafe and talk about it ?

Fred: I don't think that's a good idea..

Sam: oh come on, I insist!

Fred: well, okay then, let's go!

 в кафе

Fred: so, what's new in your life?

Sam: well, yesterday  my wife and I went shopping and we found a very good clothes store!

Fred; oh, it must be an expensive one

Sam: oh no, it is pretty cheap. Do you think that a cheap shop can't be a good one?

Fred: yeah, you got me, that's exactly what I think!

Sam: and I don't see any difference, you can buy the same shirt in the expensive shop or in the cheap - it's still the same shirt!

Fred: yeah, but the quality is a big difference! 

Sam:  as I see I can't prove you that my point of view is right

Fred: yeah, let's just order something to eat!

импровизация;)