Cancellations? Wow almost never. I think he's been ill twice? There was some days after Hurricane Andrew destroyed everything when he and his partner had to find new office space. I don't count his or my "vacations" from therapy as cancellations because they are expected and normal. But even so, when I'm on one of my jaunts, phone sessions are always set up (and they are really helpful for me.) I doubt I would be going and doing anything if I couldn't have a phone session to keep me balanced