Just called our business. "ASSIST" on CID yet again. When I see ASSIST now, I pick up and do not say anything. They always hang up or a recording kicks in.
This is a spam phone. If you are registered with FCC's "Do-Not-Call-List", the best action is to report the spam call. More complaints (on the FCC's File A Complaint) will result in action, and will put this spammer out of business.