If you are a member of Passport you can cancel your booking from the dashboard by clicking on the booking you'd like to cancel at the bottom of the page.  Or you can search your email for the booking confirmation and click the cancel button in the email. 

You can see all your upcoming appointments here.

 If you are not a member a GSVlabs (you can sign up for free here) you can search your email for the booking confirmation and click the cancel button in the email. 

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