I like your story. Touching, yet calm.
I think most of the day we are in our own heads, thinking about our problems, about our lives, about what should we do next. It is all about us, better to say me. So (I am not sure if you are really a waiter or is it just for the story) you have an incredible opportunity to practice selflessness every day, to get out of your and make someone else's life a bit lighter. But not just you (please don't find this offensive), all of us should do this. We would make this world at least a bit better. :) If this really happened, thank you for doing it. :)