You can change the ticket registration type so your registrant can transfer between the ticket types that you offer for your event.
Please note that you will have to manually collect or refund any money associated with the ticket type change independently.
How to get there:
Login to your Wizathon account.
Click on the "Participants" tab.
What to do:
Click the fourth action item, "Switch Ticket" (arrows icon).
You will then have the ability to switch this participant to another ticket type.