But I wasn’t really involved in the business (what I did everyday is answering calls, booking tickets and making hotel reservations. That’s not much. So I was bored most of time I was at work)
These are the kinds of things that belong on your resume. Leave out the word bored, though. If you haven't been involved in the business, tell them you really, really want to become involved - on your next interview.
You've found a few interview questions that give you problems, like your greatest weakness and best strong point. The other killer question seems to be "Tell us a little about yourself". Work up some answers, and practice till you can give them with a straight face.
Yes, refusing to handle cash was a bad career move. I can think of several reasons not to want to, but refusing new responsibilities just isn't good. This is not something you want to mention at interviews, by the way.