I would like to modify the email template for support rep marking leave in the calendar.

By default I have : 

Hi support rep,

Request ID xxx  is appended with new reply from xxx .You have been chosen as a backup Support Rep as support rep is unavailable.

Request details are:
Created by: System
Due by date: Wed, 11 May 2016 14:39:11 +0200
Category: 
Title: 
Description:

Is it possible ?