I just pulled up two ADRs from the online system. One at California Grill (like the one I had trouble with earlier this week) and one from Boma. The Boma reservation had a cancel button exactly where you said it would be. The California Grill one did not. It probably has to do with the CC guarantee in the CG reservation.Sorry, Samsma, I didn't really answer your question. Once you get the ADR retrieved (see above), there's a "cancel" box on the right side of the confirmation info. Click there, and you can cancel.