I got a ticket with someone else's flight information, and I was really worried that someone had stolen my miles or something else bad had happened.

So I called up the airline to figure out the problem.
It turned out that the other passenger has the same name as me, but my email address is [email protected] and her email is [email protected].
I've been tempted to email the person to see how their trip to London was, but I haven't emailed her... yet.