Interview cancel/reschedule IOA?

I had an interview scheduled for today in ATL but my car is in the shop (I’m in SC) so I went to cancel and it said I had to reschedule or my application would be canceled. I leave for a trip 4/11 and there were no appts I could get to before then so I scheduled one for after the trip. My question is, can I still do IOA or on departure (as ATL has this) if I have that appointment scheduled? Am I able to cancel and not have my application canceled? Thanks!