Write a rejection letter. As an extra challenge, make it so nice the person isn't positive they've been rejected. If you need some ideas:
Rejected from Star Fleet Academy.
Rejection of a really bad book.
Rejected from Hogwarts.
Rejected from Match.com.
Rejected from Hell.
Rejection of a town "improvement" idea.
Rejected as a comic book hero.
Rejected from demonhood.
Rejected from Godhood.
Rejected from Angel Academy.
Rejection of a spell from The Grimoire (Standard Edition) (Revised).
Rejection of the ugly duckling.
Rejection of Santa's replacement.
Rejected from reform school.
Rejected from charm school.
Rejected from the zombie pack.
Rejected from the Vampire Hall of Fame.
For some grins when you're done:
Other People's Rejection Letters and
Letters of Note.