@ElizB — My comment doesn't suggest a way to greet someone, or whether the greeting would be perceived as polite, so I suspect I'd receive a bunch of downvotes for posting it as an answer. I think it might help the OP fine-tune the question, though; the OP has expressed uncertainty about the appropriateness of offering a greeting, even though the question is focused more on the mechanics of how to offer a greeting. — Gaultheria 39 secs ago