Automating attendance confirmation

I think it would increase the retention rate if we automated the email that goes out to attendees of events, for example a few days before the event application period/confirmation deadline.

Not sure how this is implemented but this is primarily how it would go:

Participant is accepted
Participants hasn't confirmed/denied attendance within 24h
Participant gets automated email "remember to confirm"
Participant accepts/denies/nothing
Participant gets another one

Or something like that. Opinions?