Click the "My Registration" tab above to modify or cancel any part of your registration. You will be asked to enter your registration confirmation number listed in your confirmation email.
Visit the registration site
here. Click the "Register" button on the top right to advance to the confirmation number retrieval screen. Beneath the "Invitee Information" fields, click on the "Already Registered?" link. Enter ONLY your email address and then click "Confirmation number sent to you." You will then receive your confirmation number via email.