This is my quick letter, I made this in 5 minutes.
I'd like you guys to check them out and give opinion. THANKS!

Hello, Jack

Its been a while since you replied my last mail. Sorry for keeping you waiting for my replies, because I was having my final examinations. Anyway, have you finished your examinations? Im sure your grades will be good.
My holidays start from next week, how about you? I'd been always waiting for this moment, because Im going to my grandparents flat next week. Do you have any plans for your holiday? I think this is enough for today. Im waiting for your response.