I am _________ (name) and I work as _______ (designation) in your reputed company. My employee ID is ________ (mention employee ID number).
This is to inform you that as per the application number _________ (mention application number), I am on leave for _________ (number of days) from __/__/_____ (date) till __/__/_____ (date) and I write this email to request for an extension of __________ (number of days) i.e. till __/__/_____ (date).
I shall be highly obliged for your kind support and expect your kind support in this regard. If required, you may contact me at ___________ (mention contact number).
_________ (Contact details)