Соствь диалог: образец: a: can i have a packet of biscuits, please? b: yes, of course. here you are. that's one pound nine pence, please.

Can I have a pack of milk?
No, sorry.We havent got milk.
Can I have some chewing gum, please?
Yes,sure.
How much does it costs?
It costs 1 dollar.
Here you are.
Have a nice day!
Have a nice day,too!