It is with my profound thanks and appreciation that I acknowledge your consideration and kindness with regard to my inability to have my car available for transport on the scheduled date.
Your attitude and willingness to render service to me on another day convenient to me was consistent with your policy of doing your utmost for your customers.
You certainly try to satisfy everyone.
Your perseverance in this effort is indeed praiseworthy.
We have done business together for about thirteen years and you have never failed to fulfill your obligation satisfactorily.
I wish you good luck and good health in the years ahead.