Ability to mass delete future sessions in Calendar rather then individual series

therapists leave placements and we need to clean up their calendar of future sessions so a new therapists can come in. We ask the departing therapist to do this but sometimes they can't. This feature would benefit therapists as well if they have the same process as us, but we have to individually go to each session and cancel the series and enter our password to do it each time. For a full month of sessions it can be quite a lot of work.