'She' may well be genuine, however wouldn't it be better to call someone you know in the industry, or in the company, friends etc etc rather than post those sort of questions on here? As for 'her' reference to the registration number, surely something like "he flies for the company" would be more natural.
I'm sure, thanks to your sage input, she will have learned her lesson.
If you understood how these private operators don't have the "ops" infrastucture that you have been, and are privileged to enjoy, you might understand that it is entirely plausible that the post was a genuine request. My wife would have been in a similar dilemma. Terribly worried but no-one available to ask at the time.