No need to as rude as she was. Just a friendly reply would have been enough. We chat with our customers but not on a personal level. I judge it by how they are with me first but some go OTT and one started telling me about an itching she had under he bust and was continually scratching them under her T Shirt all through he lunch. Some get more personal the more they come in but we dont want to know all their personal stuff, but you have to try to be polite and move onto the next person. I never judge people by what they buy to eat, as they can be as greedy as they like.