Hi. My name is John.
Hello, how can I help?
I need an appointment with Dr. Johnson, today if possible.
At what time can you be at the clinic?
Any time , the sooner the better.
Could you describe your symptoms, please?
I've have had a cough and a sore throat,  for two days now. I hope it's not strep throat. I had that last year.
Great, your appointment with Dr. Johnson is booked for you!
Can I also schedule a vaccination for my son Ben about the same time. It seems like we catch everything going around. 
Great, your appointment with Dr. Johnson is booked for you!
Thanks. Have a good day.
Thank you and goodbye.
Wait what time is my appointment?
6 pm