英文文法問題, 唔知對不對

Hihi, long time that we haven't chart, Christy told me you're going to marry on Aug 08, congratulations..
I think it is better written as:
Hi, it's been a long time we havn't chat, Christy told me that you will get marry on Aug 08, congratulations and with my best wishes.

Hi, we have not chat long tine. Christy told me you are going to marry on Aug 08, congratulations..

Hi there, it has been a long time since we have chatted. Christy told me that you are going to get married in August this year. Congratulations!