Never having used Genie yet, what happens if I book a LL for a later time and by the time we are eligible to scan in a member of our party is no longer in the park? What happens if someone gets to an attraction and decides they no longer want to go on that ride, or may be a little to scared to go on? Is there a way to clear them from the LL? I would hate to not be able to book another LL until the 2 hour mark because our entire party did not scan into the attraction.