I AM NOT A LAWYER- seek legal advice from an attorney in your area for specifics.
With that said, in most cases you may
Ask, "is the dog a service animal?"
Followed by, "what task is is trained to assist you with?"
If the answer isn't, "yes" followed by a reasonable answer then you may still decline the ride.
"provides emotional support or companionship" is not a specific task.
Keep in mind, service animals must still be housebroken and cannot show aggression towards other animals or people.
With that said, in most cases you may
Ask, "is the dog a service animal?"
Followed by, "what task is is trained to assist you with?"
If the answer isn't, "yes" followed by a reasonable answer then you may still decline the ride.
"provides emotional support or companionship" is not a specific task.
Keep in mind, service animals must still be housebroken and cannot show aggression towards other animals or people.