Just know that their projection is their current state and has nothing to do with you. I've been in dozens of situations where the patient just didn't feel like talking and initially, I pushed back hard (Then why are you even here?). Eventually, I learned that small talk in the beginning, changing the subject, asking about certain non-medical things you notice works wonders. Only once have I ended an interview because I just wasn't getting anywhere. He was a homeless guy for EtOH detox and kept saying that he just wanted to sleep and I was like, go to a hotel. But after his nap, we were able to get down to business no problem.