Hi Andrew,
Good for you. You were trying to help the student right up until he left. Even if a student leaves by talking with him/her you are leaving the door open for them to return because they are not leaving with hard feelings, they are just leaving. I know when a student is set on dropping our I have a talk with him/her and then I give them my business card and tell them that they can call me anytime and I will help them get back in school. This has made the difference many times in their coming… >>>