By way of background, I am a health professional by training (but I no longer practice). Now for a minor rant.
I always have trouble with this notion of sensitive to certain smells; especially when I see signs in hospitals asking that perfumed products not be worn due to sensitivity to odors. Clearly the term sensitive is used to conjure up the image of allergy, but carefully avoiding the term allergy. Health proffesionals understand allergy and that it can be life threatening. Sensitive to odors is an unknown.
It is much like the patients that claim an allergy to drugs. What they mean is that they had an adverse reaction - often soemthing minor like upset stomache. But in the health professional, it sends up the red flag of anaphylaxis.
I often wonder how much is required to come up with a diagnosis of Munchausen syndrome. End rant.
I would suggest inquiring further about what the sensitivity is - what chemicals/smells, and what the reaction is. This should help you decide if this is a person you really want to deal with.