(Calling the NHS doctor in the UK.)

Me: I want to make an appointment

Receptionist: you can only make an appointment on the same day as you call, and you have to call between 0830 and 0900

Me: Really? Er...

(Next day around 0845) Ring ring ring ring ring...

(0900) Me: No-one answered between 0830 and 0900

Receptionist: you can only make an appointment on the same day as you call, and you have to call between 0830 and 0900

Me: ???