Formal / Informal expressions

Formal expressions.
Yes, I hoped you would give me a hand with the painting.
Pardon? Sorry?", "I'm sorry? "Excuse me?"
I was wondering if I could borrow a book for the evening
Would like you to get us the files.
Would you like to come up here on Sunday?
Please help yourselves to another drink.

Informal expressions.
Yes, I needed you to help me with the painting.
Be off with you!
What?", "You What?", "Eh?"
Go and get the file,
Come and have a drink, Son-mee.
Look, come to a party at my home tonight.