Respected Sir/ Madam,
I write this email with utmost respect to inform you that I am working as a ____________ (designation) in your reputed company for last _________ (mention duration) bearing employee ID number ___________ (mention employee ID number).
This is to most humbly inform you that as per the approved application ________ (mention application number), I am on approved leave for ________ (number of days) days from __/__/____ (date) till __/__/____ (date). In this regard, I would like to inform you that I am willing to be on leave for another _________ (number of days) days as ___________ (mention reason for leave extension).
This is to request you to kindly approve the request and grant me permission to be absent for the said days. I will be joining from __/__/____ (date) onwards. I await your kind response.
__________ (mention employee name),
__________ (employee ID),