Path: Login into Eventdex account > Manage Event > Expand Registration tab > Click on Emails > System Templates
By default you can see one standard template(Order Confirmation)
What is Standard Order Confirmation template?
Standard Order Confirmation template is a standard template that is sent to the buyer as a confirmation to this purchase of tickets or items for an event.
As per the need you can create a new custom order confirmation template.
How to create a custom system template?