Составить диалоги на тему help buy a new bag на английском

hi -hello -how are you? -I am fine thanks and you? -me too -I would like to buy new bag -oh okey , can I help you? -yes, ofcourse  -let's go to my favourite shop  -okey -what bag you would like to buy? -I want big bag for school -what do you think about this? -I don't want to buy white bag. it will become dirty very soon -okay, and what do you think about these one  -it is boring i'd like to buy colourful bag  -why don't you buy this one  -wow! it's the coolest bag I ever seen! I will buy it! how much is it? -it cost 45 dollars and look at this!it is sale! this bag will cost 25 dollars! -great! I am so happy!