How I typically respond when I don't know an answer to a question is I will find the answer. I don't know isn't an answer, so I would never tell a customer or anybody I don't know. It would, I would always find the answer if I didn't know. If I was on the phone, I would put them on a brief hold. If I was face to face, I would just excuse myself and find the answer to the question so that way we all were able to know that answer.