1)
Luca: Hello, I'd like to try this jumper
Shop assistant: Of course. 
Luca: But I don't like blu. I would like to try a green jumper
Shop assistant: Ok, I go to take a green jumper, one moment please
Luca: Ok, thank you
Shop assistant:  Here you are! 
Luca: Thank you
Shop assistant: What size are you?
Luca: Short
Shop assistant: Ok
Luca: It is very cool, how much is it?
Shop assistant: £25  
Luca: Perfect, thank you 
Shop assistant: Nothink
Luca: Bye!
Shop assistant: Bye!

2)
Shop assistant: Hello, can I help you?
Sofia:Yes, I can. I want to buy this dress
Shop assistant: What size are you?
Sofia: Medium
Shop assistant: One moment please.
Sofia: Ok
Shop assistant: We've got these ones here
Sofia: Ok, but I want to try a pink dress
Shop assistant: We've got only one 
Sofia: Ok, thank you
Shop assistant: Do you want to try this skirt?
Sofia: Is it pink?
Shop assistant: Yes, it is
Sofia: Cool, I buy this one
Shop assistant: Ok, that's £30
Sofia: Thank you, it is very cool
Shop assistant: Nothink, bye!
Sofia: Bye!