Hello
Hello, how can I help?
I wanna make an appointment with Dr Johnson on Thursday, 8pm please
Could I have your name, please?
This is Mark
Could you describe your symptoms, please?
headache, dizziness and muscle weakness. 
Alright, Dr. Johnson is available at 8 pm. Can I book the appointment for you?
You gotta! Thanks :)
Great, your appointment with Dr. Johnson is booked for you!