Contacted by admissions for interview, but haven't heard from my interviewer?

I was contacted by the admissions office about 2 weeks ago notifying me I would receive an interview request from an alumnus. However, I have not yet heard from this interviewer. I also checked my spam email and nothing was there. What should I do?

Maybe politely contact the undergraduate office and follow up about your situation.

^^I would definitely do that- keep in mind interviewers can be pretty busy at times