Hi there!
I will be happy to help you with that. I have checked your attached file. We will use on edit trigger to synchronize any change happens on the sheet with your calendar, when you add, modify or delete an entry for room 1 for example, the change will be reflected on the respective calendar of room 1. I assume that you use all day events to mark room bookings on your Google calendar.
To synchronize the sheet with the calendar, we will have to use time driven trigger as the calendar doesn't have any on edit or on create triggers. Unfortunately, the synchronization won't be immediate. If you want the changes on the calendar to be reflected on the sheets, we have a turnaround for this, but I will have to change my quote.
I will be happy to address any of your questions!
Cheers,
Mohamed