Interviewer not responding

Received an email 1/31 and responded with days/times for Skype availability. Never heard back. Emailed again but still no response. Should I leave it be or let admissions know? I’m worried that there will be a record of me being offered an interview and the interviewer submitting something that suggests I was not available. It’s somewhat disappointing that an alum wouldn’t have the courtesy of at least telling me he is busy. Maybe he was lucky enough to not feel the stress of the college aapplication process.