Hi, what package do I need if I want to use the website to schedule appointments?

Hi, I want to use this website for people to schedule appointments with me.  I noticed that's an option but don't see which package it's included with.  Please confirm what I need to purchase in order to get this functionality.  Also, is there anywhere on your website that has more info on how this works?  I'm considering using a few different solutions such as Calendly.  Thanks.