In reply thereto, we wish to inform you
In reply to your valued favor
In response to your recent request
In spite of our best efforts it is not probable
In thanking you for the patronage with which you have favored us
In view of all these facts, we feel justified in claiming
Information has just reached me
It gives us pleasure to recommend
It has consistently been our aim to help our customers
It is a matter of great regret to us