How to write a letter to bank for bank facility.

PLease helpe me for one formal litter.

I want to write a letter to bank for some facility as follow:

1. Bill Discounting (100000)AED

2. Light of Cradit (100000) AED

3.T/R (100000)

4. Overdraft (100000)

But at first I want to have good start then in enather paragraph I start to write these request.

Please helpe