When I was an active dom, I made my interests, limits and prices known upfront. When an email or phone call came in, I'd ask open ended questions to see if there was a good connection and learn about their interests. One thing that I'd watch for is someone who contacted me too much before a session. It was almost always a sign they wouldn't show. For the most part, this worked well. After a few years of tweaking the qualifying process, I had a near zero no show rate and close to 100% of return of super fun clients.