I was hoping to see the neurosurgeon today

...but I received a phone call cancelling my appointment about 20 minutes before I was about to walk out the door. I was told that there are multiple emergency surgeries that the doc is involved in today. OK, shit happens. But as of the cancellation phone call I don't have another appointment. Apparently the practice is to call everyone and cancel today's appointments, and then call everyone back and make new appointments. Am I missing something here? This doesn't make any sense to me...