What does it take to be nice?

So I am at DD's getting a self serve refreshing iced coffee when I notice a lovely elderly couple enter with a nurses' aide. She brings them coffee. I go to the counter to pay for mine and observe the food handler bringing cooked food to the cashier, saying " can you bring this to that elderly couple." They come in here everyday. The cashier who is a young girl rolls her eyes and says, " They have a nurses aide .Let her pick it up!" Now there was no one else on line. There was no morning rush. What would it have taken for that young cashier to deliver their food to the table? The food handler had it right! But
really! I will admit that as I paid for my iced coffee I remarked to the young cashier, "You ll be old one day too."  My iced coffee tasted better after that.