After re-remembering, I think he said he slept through 2 alarms. He overslept because he had to stay for an after-event meeting since he was an organizer and didn't return to his room until 4:30 or 5:00 a.m. -- the appointment was for 10:00 a.m., I think. We had a rather catty text exchange when he finally responded and apologized. I was annoyed because he wasted my time, and he thought I was whining. My main issue was that he didn't offer to reschedule -- not even an "I apologize for missing the appointment and unfortunately can't reschedule because....." (fill in the blank).