Clients can pick a meeting time from your availability and have it automatically sync to your calendar
Include a link in your emails that allows clients schedule a meeting when they're ready.
Since clients can reschedule at anytime, they don't feel like they're locked into the time. When a client wants to reschedule, they simply pick a new time from your calendar.
Brand your booking page to build brand recognition with your clients. Specify blackout dates and times so clients can only pick times within the range that you are truly available.