That's totally fine! We can't blame you... It's sometimes hard to get firm commitments and RSVP's.
We always recommend reserving for the MAX amount of players you are inviting so that you can hold the slots. Ensuring we do not fully sell out the time you are interested in.
After you get confirmation from the group you can simply call us or chat with us here on the site about lowering your reservations player count.
You are allowed to change the number of players up to 2 days before your actual event. Giving you time to get responses back from other players in your group.