you should write a mock letter of praise
"Dear Sirs:
This is to inform you that I have found my experience with your Pony Express service to be outstanding. My package made the round trip back to my homestead well within the expected six months. Why, once the steam-driven machinery is implemented, I can only imagine that the timing of such a trip will be cut in half! Huzzah for modern conveniences!
Yours in perpetuity,
Genghis Cohen III, Esq."