The ability to have 2 buttons on the form that have 2 different actions. One to accept the invite to the event and another to decline the event. The contact can also change their minds and re-register later. Also, a way for us to cancel/de-register a registrant (maybe our contact doesn't have time to de-register themselves). The only option I see is the ability to delete a registrant. We would like the ability to create reports to see registrants who register and attend, registrants who register and don't attend, people we sent invites to and never register