It puts them on hold for a certain time. You can pick other seats or risk it and wait to see if they are available a little bit later.
If you create an acct you can save your card info to purchase immediately at anytime
You could try a different time or go in and pick new seats and pay. I usually do that ahead of time. By the way I and 3 of my Grands (4-11) enjoyed the movie and hope you do as well.
Try a different showtime.
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