Greetings of the day,
I am writing this email in order to inform you that I am unwell, as I am suffering from a sore throat/ throat infection.
Therefore, it is to request you kindly sanction sick leave in my name. I believe that having a rest would help my throat heal faster. I shall be highly obliged if you could sanction me sick leave for __/__/____ (date).
Your kind response is awaited. For further queries, you may contact me at ________ (contact number).
________ (Your name),
________ (Employee ID number)