I don't know that I will ever need this knowledge but it will be very helpful if I ever do.
"Cue the dog to help you locate their owner by asking “what?” or “where?” or simply begin following the dog."
https://www.westparkanimalhospital.com/blog/if-a-service-dog-approaches/
@Axomamma @technewslit @jeffowski wow! Didn't know this!