I had a layover at DEN recently. Passenger next to me needed a wheelchair. Upon arrival they said that there wouldn’t be a wheelchair available for a while. She decided to walk even though she struggled to do so.
I saw an empty wheelchair near the gate. So I told her to sit in it and wait. I went to the bathroom, came back, and still saw her there. So I then pushed her wheelchair to her next gate. That saved her from having to walk. I had a long layover because my connection was delayed so I didn’t mind going out of my way to help her.