Insincerity of purpose

I'm in a meeting with staff from other library authorities to discuss a collaborative project and none of us have the power or authority to commit to any action because none of us are the people who should be there. Some are first reserves for people who are off sick or on leave. Others, like myself, are covering vacancies. And then there's Debbie Potterthwaite:

"Looking forward to your new job Debbie?"

"Yes, it should be good."

"When's your last day?"

"Today."