Notifications section inside the Event Builder is a place where you can tailor email and SMS notifications. Navigate to 
AI Scheduler → Events and click on:
Any existing Event → and select Notifications section from the left side menu or
Create New Event → and define event details and hosts first in order to be able to access the Notifications section
Click on "Edit" button inside the "Confirmation email" notification
Below the email there is checkbox with option to
"Include cancel and reschedule links in invitee's confirmation and reminder emails"Uncheck it, and these options will not show in confirmation emails anymore
Learn more about Event Notifications in this article here.