Aww....what a sweet story!
I'm wondering though, if she didn't know how to use the farecard machine, would that be a clue that she doesn't normally ride the train?
Orrrrrr.....it *could* be that you caught her eye too and she asked you for your "help" so that she could get a closer look at you.
Well good luck finding her! Let us know if you do!
.....Kelly