Dear Sir,
I have been employed as a faculty of [subject] in this institute/university since [period]. In order to upgrade my knowledge and my self-development (write your reasons), I wish to undergo a [course name] course which has a duration of [duration] year/months, in our institute/university.
I am hopeful this course will raise my confidence level to enable me to fulfill my role more prominently than ever before. I would like to request you to allow me a certain concession in the fees of the course as an employee of this organization/institute/university.
Trust my request will be considered favorably.
Thanking you.
Yours faithfully,