I got a flat the other day, and I was really surprised that none of the cyclists asked if I needed anything. Some of the walkers stopped to chat. I provided them with some entertainment, I guess. A woman from the neighborhood was over feeding the ducks, and she offered to drive me home

Anyway, fortunately I was prepared. A CO2 cartridge might have helped, but the tube needed to be patched or replaced first.

It occured to me that the LBS should warn new riders, maybe have a handout they can give away, on how to get the tube out, fix it, and put it back. Until you get a flat, I can imagine that new riders don't think it will happen. It doesn't happen in cars often.