Respected Sir/Madam,
Most humbly, I would like to inform you that I am working as ________ (designation) in your reputed company holding employee ID _____________ (mention your employee ID).
Courteously, my name is ____________ (name) and I am writing this email with the utmost respect in order to request you leave for ____________ (number of days) days as I have to attend family function that is to be conducted on __/__/____ (date) at _________ (venue/ city name).
I shall be highly served if you could provide me leave for the above-said dates.
Thanking you,
Sincerely,
_________ (name),
_________ (designation)
_________ (employee ID)