需要一个关于购物的英文对话，两人交流，两到三分钟，好的话加分噢~

Shop Assistant：Welcome to our shop ,May i have you ,sir?
Customer：Good afternoon ,I’m just looking around .
Shop Assistant：I see ,i'd be happy to show you around and explain some of our products to you ,if you like .
Customer：That will be nice .Do you sell doll ?I want to buy one for my friend's birthday .
Shop Assistant：Oh ,we have a good variety here .What kind do you like ?
Customer：I guess something moderate in size and color .
Shop Assistant：How about this one ?

有2个，再写一个买衣服的吧.

Sales：Good morning, Can I help you?
Customer：I looking for a light blue sport jacket.
Sales：What‘s your size, sir?
Customer：I think the medium size fit me all right.
Sales：A moment ,please. While i get it for you.
Customer：Thank you. Perhaps the large sizw will also do.
Sales：Yes, Let me see. Ah, here might be the right one: the medium size. And I think the color is right for you.
Customer：Oh, I like ligit blue. I'll try it on. Hmm...it seems to fit. How much is it?
Sales：30yuan.
Customer：All right. I'll take it.

有不明白请再追问 thanks