I’ve got one now—Inquiry requesting to book, minimal information & not answering messages. I’m guessing she booked another rental. I’ve had new to Airbnb guests who just don’t understand this is more relationship based than a hotel.
Some guests want to do all by phone. Since they’ve booked, call them. It is bothersome but to protect yourself since it is an off Airbnb platform communication, document what was said in an Airbnb message to them.