I have arranged an appointment with a non-NHS healthcare provider. It's for a specific problem and is well-reputed but not (as far as I know) available on the NHS. I made the appointment and then realised that the practitioner hadn't given any information on price. I texted to ask and the reply explained that they did not discuss costs until the initial assessment had been made, at which point they would talk it all through with me. I replied to say that I understood but would like to know how much I can expect to pay at the first appointment and I haven't heard back. The appointment is scheduled for Friday. AIBU to a) want to know how much to set aside for the session and b) to cancel the appointment tomorrow morning if I haven't heard back from them?