What to wear???

I hope this is the right forum for this question.....

I am currently a pre-nursing student working on my pre-req's. I have applied for a job at a local hospital as a "Patient Ambassador" in the ED. In addition to providing some extra $ to my family, it seems like a good opportunity to familiarize myself with the hospital system and perhaps get a "foot in the door" when I graduate.

Well, I received an email suggesting that I might be contacted by the hiring manager for an interview. Great news, but what should I wear if interviewed? My background is Finance.... all suits, high heels and panty hose! Would I wear a suit to this type of interview? Any other advice or insights to help me in the door?? Thanks!