Is calendar automatically synced between different events?

I'm wondering if my customers are able to schedule their appointments between  different events for my services and their features, without having any schedule related issue in matters of day and time available, for example: 

option 1: event cost: 300, scheduled: saturday 9:00 hrs

option 2: event cost: 100 scheduled: Same availability?

My appointments on the calendar will be organized automatically or, do i have to figure my appointments out every event