"It's a shame that your page is lost, but at least it's in good company; stick around to browse through NPR stories about lost people, places and things that still haven't turned up." Followed by: Amelia Earhart, Jimmy Hoffa, Waldo, etc.
Not helpful for the person who's trying to find the missing page, but entertaining.
It is a good example of using a little humor to help defuse a user's frustration.