I made the same guilty mistake yesterday- Someone who has ridden before and I loaned him one of my bikes. 10 miles to the cafe and on the way back I decided to check if the bike was right for him. Asked him to go into granny and it wouldn't. "See" he said- "I push the lever and nothing happens" Same reason- pushing both at the same time.
Now this is someone who does not have his own bike but has borrowed his Father-in-Laws spare one. I assumed that he knew enough to ride the bike- but F-i-Ls Bike- Downtube shifters.
But I reckon Phone number would be the minimum requirement- Then you can invite her on a ride to help her in her future problems. And invite her to join the 50 + if she is eligible or as a mascot if young enough.
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How long was I in the army? Five foot seven.
Spike Milligan