That means I'll do everything I can to be sure that you never regret doing business with me. That's a guarantee. Harry would then wish the couple well and give them a quart of ice cream in appreciation of them stopping at his store. Harry had a novel idea to motivate this young couple to come back to his store. The point is that he did something to try to motivate the people to buy in his store.
People always shop around.
But while we live it we are called to live it fully, with sensitivity, care, and concern, not just for ourselves, but for others as well. Life unshared is meaningless. We have the opportunities while we are alive to share our lives, and we must constantly be on the alert to seize them while they come our way. We must be willing often to take risks if we expect to achieve our purposes and goals. So it often seems in business and life in general.