Tell the hiring manager how you are able to be diplomatic in the face of change and adversity.
"Just last week I received a memo from our company's head office stating that as of 2017 we will not be permitted to offer overtime hours to anyone. Knowing that a lot of my employees rely on that additional income, I was quite disappointed in this decision. I gently challenged it by crunching some numbers specific to my facility only. I found that offering overtime was less expensive than hiring and training new people to work part time hours. My proposal is still under review but I am hopeful."