I don't work here

So I'm at the pharmacy tonight and some guy comes up to me and asks if we have bath soap? I'm speechless for a few seconds trying to avoid saying I don't work here, but try to direct him to some aisle. This hasn't happened a million times to me but it does happen and I wonder how often it happens to others. Once I was putting away some jeans I had tried on and some lady comes over and asks about where a certain sized pant was. She told me that it looked like I knew what I was doing that's why she thought I worked there. Tomorrow I'm going to try to pretend to be a millionaire who walks around the house in his robe, I'm hoping a bunch of confused playboy bunnies show up.