Can the RSVP status of a user be discarded if they don't pay for an event in a set period of ti

Can the RSVP status of a user be discarded if they don't pay for an event in a set period of time?

Currently a user can click on an event and RSVP "Attending", which reduces the number of available tickets, without ever having to pay for the event. It would be good if their choice was discarded after say 1 hour or not even saved if they don't pay for the event immediately.