buatlah dialog Asking, Accepting, Rejecting Service!!!

x:would you like to come my birthday party ?
y:hmmmmmm i'm sorry i can't i'm busy
x:okay ,never mind bye
y:bye
(rejecting)
x:can i borrow your book?
y: of course
x: thank you
y:okay
(accepting)
would you like to......bla bla (asking)