Hi Louise, 

Sorry, I am not sure if I understood the question properly, if you are referring to blocking dates for booking you can do that by creating Days Off for employees in Amelia (when you open/edit an employee you will see the Days off tab) and there is the Special days feature when you need to change the available times on some dates. If you are referring to something else, please explain in more detail what exactly do you want to achieve and we will gladly help out. Thank you. 

Hi Louise, 

I see, there isn't a possibility of blocking someone from booking appointments in Amelia, unfortunately. You can suggest it as a feature request here.