It would most likely be the hood because your hook is supposed to grab the readers attention
Conclude is the word you are looking for
My dear Alex,
You will be glad to know that my brother’s marriage is taking place on 25th Nov. My brother has asked me to invite you.
So you are cordially invited to attend the marriage. You are requested to come two or three days before the marriage to help us in preparations.
Please convey my best regards to your parents and love to Youngers.
Yours sincerely,
Sarah