Thanks a lot for inviting me to your precious birthday. I'm glad to be there. I will make myself free. I can stay with you three days. Actually, I went to buy a gift yesterday and I didn't make up my mind so I won't bring you one but I promise I'll take you out to buy those sneakers you like as a present, if that's okay with you. Don't worry about the price. Also, do you know where I can rent a car before the birthday party? Too get around with, if not, I can borrow my brother's car.
See you later alligator,
ps. Where will you have the birthday party? In your house or in your parent's house?