Go to the locker room.

You decide to go to the locker room, just as Kelly's friends walk away. It's not like you would want them to know you heard their little conversation.

You go to the student area and see that it's populated by just three or four people, none of which you could really name. And so, you ignore them and walk into the locker room, noticing immediately one thing; it's just as empty as the main hall.

As you go further into the room, you notice a few students taking their belongings out of their lockers. Your eyes catch the figure of Kelly rather quickly, as she struggling to get her locker open.

If she's as forgetful as the friends made her out to be, this could be the perfect opportunity. You're know of the very few people who know her locker combination, but openly telling her that just might get you in trouble. Using your wit however, you could make it seem like you have some sort of talent with locks.