高分 请牛人帮我写几句英语请假条吧

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 allergy. please excuse his/her absence and assign him/her any missed work from last class. thank you very much.

your sincerely,
(parent's signature)
(Date)

关键句：my brother will get married next week.I want to join in his wedding. Can I have 2 days off?