Dear Twilight!
I heard about your personal student, and I wanted to congratulate you! I am sure you will do wonders for Cozy Glow, and it is inspiring to see you offering her a second chance. Not many ponies would, I think.
However, I wanted to ask you if you could possibly take on another student? My own little Flurry Heart is approaching the age when she needs magic lessons, and I could think of nopony better to help her perfect her magic than you! Perhaps Flurry and Cozy could study friendship together? Surely it takes at least two for good friendship studies?
I eagerly await you answer. Again, best of luck to you and to Cozy Glow too.
Your Sister-in-Law
Cadance