At first, I thought it was a weird request.  We were at an art show and a gallery owner we know, apologized and asked me to retrieve his phone that was charging in his booth which was about fifty feet away. He was pushing a stroller with the young child of his assistant who was attending the booth and explained that if he went back to the booth, the child would be upset to see her mother.
I got the phone.
As I handed the phone to him, he thanked me and I thanked him.
He looked surprised when I thanked him.
I explained that I was thanking him for the Opportunity. I explained that one should never be reluctant to ask because, while it could invite rejection, it gives the other person the opportunity to say “yes” and there is nothing better than  having the opportunity to say  “yes”.