Does Mind-Reading Ring A Bell?

I am unloading boxes on the far side of the store from the counter. We have a sign on our register saying, “Ring the bell loudly for service.” I finish up with a batch of boxes and head for the register. I find a woman standing there.

Woman: “FINALLY! I’ve been waiting here forever for you!”

Me: “Did you ring the bell?”

Woman: “NO!”

So, she didn’t ring the bell. She just silently stood there waiting for the only employee to somehow know that she was there while I was clear on the other side of the store.