Dear ,
I'm sorry I didn't att your class on time. Because I have a headache for several days, this is my first time living in , and I can't adapt to the weather here soon.
To be honest, I like learning English very much. I have made up my mind to learn spoken and written English well. I think you will be my best teacher to help me improve my English. So I apologize again for not going to your class. I will work hard on English in the future, and I won't let you down next time!
Forgive my unintentional loss!
Sincerely yours,