求助，牛人帮我写个英文假条吧

Dear teacher,

I am sorry to write to you for one day leave on Tuesday when my brother is going to have his wedding ceremony, this is his important time , I must go there to send my greetings and also help him to make the wedding perfect.

Thanks for your kindness to approve , I will make up the lesson when I am back to school.

Wish you have a nice day.

Thanks and best regrds,

Hello 老师的名字，
I am sorry I cannot attend your class today because I'm suffering seafood allergy.
Could you please kindly approve my sick leave?
I will catch up my missed work with the help of my classmates asap.
Your approval is highly appreciated.
P.S. I brought some medicine from China.
Warm regards,
你的名字

或者可以用：
那个,假条一般是父母写然后签了字比较好..

To whom it may concern,
My son (first name, last name) was absent on (date: eg.Wednesday,March.11.2009) because he is not feeling well due to seafood a