You can customize the confirmation displayed after registration is completed by editing the Event Confirmation Message. You can find this message option on the Attendee Setup tab.
To customize an event confirmation message click the pencil icon.
In the Instructions and Confirmation Messaging window, add and format your message.
Click Done to save.
The Event Confirmation Message displays on the registration confirmation page.
The confirmation message is also added to the Confirmation Email registrants receive following their registration.