He can't find any open spaces after dining and, so he looks up to the heavens and says, "Dear God, if you find me a space right now I promise that I'll go to church every Sunday."
But nothing happened. He then said, "And I'll also promise to drink less."
Just then a parking space became available. Quickly, the Irishman looked back up to the sky and said, "Nevermind mate, I just found a space!"