A passenger on a dining car looked over the luncheon menu. The list included both a chicken salad sandwich and a chicken sandwich. He decided on the chicken salad sandwich, but absentmindedly wrote chicken sandwich on the order slip. When the waiter brought the chicken sandwich the customer angrily protested. Most waiters would have immediately picked up the order slip and shown the customer that the mistake was his. This waiter didn't. Instead, expressing regret at the error, he picked up the chicken sandwich, returned to the kitchen, and a moment later placed the chicken salad sandwich in front of the customer. While eating his sandwich the customer picked up the order slip and saw that the mistake was his. When it came time to pay the check the man apologized to the waiter and offered to pay for both sandwiches. The waiter's response was, "No, sir. That's perfectly all right. I'm just happy you've forgiven me for being right."