@Bob958 You mean the host didn't respond for 5 hours? I don't think you understand what an Airbnb is. Hosts have 24 hours to respond to a guest message or booking request, although most do it much quicker. Many hosts have regular jobs and can't just be dealing with Airbnb messages at any moment.
Just because you waited until the day you needed somewhere to stay to try to make a booking, doesn't mean you can expect an immediate response.