They called to say they were going to be late for the interview, but it turned they weren't late... because they had the wrong time for the interview.
When they showed up, CW asked them who they were interviewing with. They didn't know. CW asked what position they were interviewing for, and it took a minute or two for them to remember.
In all fairness to the interviewee sometimes the name of the interviewer is rattled off (over the phone) so fast/garbled somehow that I don't quite catch it. Then I feel like an idiot to ask them to repeat themselves. They don't get a pass on not remembering what they're interviewing for, however.