I just had a student "ask" me to write a positive letter of recommendation for them to encourage them to stay in college. How do I tell them no?

This student is a freshman in college. Not in any of my classes. She is at an academic loss and her guidance counselor suggested she talk to me (whom I've never met) for help. She did end up in my office. I gave general advice on what she needs to do to improve on certain classes. I offered no "special" advice. I didn't do anything for her. I told her as such, suggested she go to her TA or professor for individualized advice. <br><br>She has now written me an email asking me to write a letter of recommendation for her to encourage her to stay in college. I literally don't know this girl beyond what she has told me. I told her I was happy to write a letter for her when **she asks me for an actual letter of rec for a job or whatever,** but that I won't write her a letter just to stroke her ego. That I hope she can get through this rough time, but don't plan on using me as a motivator. She seemed to take it well, but I'm worried that this girl is looking to use me as a security blanket while she navigates college and I don't want that. I want to help students, but I don't want to be a student's emotional support professor. How do I email her back and ensure that this is the last I hear of her? (I am a male prof, she is a female student.)