Go one better, write her a note and send a copy to her boss assuming she's not the Manager. At worst she gets an extra pat on the back and a rare handwritten ThankYou note. At best, it's goes on her Permanent Record for this job or possibly a resume if she is working toward a different job down the line (or grad school application) in the "this is the employee/student/future doctor" you want to be associated with your brand
Above and beyond always is a good habit in any walk of life
I was going to suggest the very same thing.