如何写英文信?有要求不少于80字,并且有内容提示.1、你的近况2、请对方帮你购买英语语法书3、邀请对方方便时来访

Dear XXX
Haven't wroitten tou youfor a long time,How is everything going on with you,I am fine in XX(地点).
I write to you just want to get your help.Could you please help me to buy a English Grammer book at your city for I can't find it here.
If you get it,Please sent it to me,Thank you beforehand.By the way,If you are free ,please call on me ,i will be very happy the meet you!
Bye foe now ,Thank you!
Yours
XXXX