Or just, "Are you Jane?" They often answer, "No I am Angie," or some such.
BTW, I just did a fast casual place for ACL. No name tags, no name on the receipt, just a cashier number. It was an adult, so I asked, "Who are you when you are not number 232?" He said, "We never give our names here." I reported it exactly as he said it and was paid. No questions asked. But, I did give a detailed description.
I tried that today and it didn't work. I asked her, "Are you, Natalie?" She just said no. Then I said, "Are you Tracy's daughter?" She smiled and then again just said, "No." Argh!!! Good thing a description would suffice for this shop.