https://peoplescouthelp.zendesk.com/agent/tickets/19219
As per the current feature if the recruiter books the candidate then its only them who can unbook the candidates. The candidate will have to contact the recruiter if they want to get them unbooked. There are some last minute cancellation request that can get missed or the candidate may not have the time to contact or followup with the recruiter.
Client's request(DJCS): "It would be great if the interview booking tool had the ability for those booked in by a recruiter to unbook themselves."