123, X Street, Y Avenue
[Subject: Normally bold, summarizes the intention of the letter] -Optional-
Dear Austin Parker,
After reviewing your request, I have decided to send you as our representative to the Kansas Teachers’ Seminar which will be held next month. You may use our corporate card to purchase your ticket and hotel vouchers, provided that you also prepare the necessary documentation for all expenses after the trip. Additional petty cash requests may be coursed through our Administrative Office.
I am confident that this experience will be a fruitful one for you. Have a wonderful trip!