[Interview] How do you handle a difficult situation?

Quick background: I have two years of experience as a tax staff in a mid-size CPA firm. Looking for a new job because I need to move to a new city due to personal reason.

I'm trying to prepare for interviews, but I don't know how to answer this behavioral interview question. "How do you handle a difficult situation?"

I find it hard to answer, because I need to come up an example or story with last work experience, but to be honest....I can't recall where I had a difficult situation or conflict at work.

How would you guys answer this? any good accounting stories?