Respected Sir/Madam,
My name is __________ (name) and I work as _________ (designation) of your company and my employee ID is _____________ (mention).
I would like to inform that I will not be able to come to office today as I am not feeling well. I am going through a severe headache and it won’t be possible for me to work today.
This is to request you kindly approve my sick leave for today, i.e. __/__/_____ (date). I shall be obliged for your quick and kind approval. For further queries, you may contact me at __________ (contact number).
Yours truly,
____________ (Name),
____________ (Designation),
____________ (Employee ID)