Deleting scheduled meetings and its booking (central management of Zoom room with Google Calendar)

Background is: 

- A lot of people block rooms for 1:1 and other meetings, they forget to cancel if they are in vacation and some rooms a just blocked and no-one shows up.

- User. i.e. executive assistants have to manage bookings for several people that frequent occupying meeting rooms.

- Its always a hussle for them contact everyone and to ask to make the room free - and sometimes they don’t even reply.

What is the best option for enabling  a few users, like executive assistants so that they could manage and free up meeting rooms when necessary ?