When I worked retail the standard greeting was "Hi can I help you" and the standard response was "No, just browsing." But of course the key is to get them chatting so you can help them and in turn, get the commission. So I started greeting people with "What's the good word?" The weird question would throw people off and I got more people to talk that way. Although a lady once chewed me out for it, got really mad at me for asking. My guess is because she couldn't think of an answer she lashed out instead of having to appear confused. Boss told me to stop doing that, but I didn't because it was effective even if one lady got mad.