Hi, I'd like to make an 
Sure, what kind of appointment is this?
My car shakes somewhat violently on the road and smoke comes out of it. It still runs though.
Is this an emergency?
Kind of yeah.
Then, would you like to set up an appointment at the earliest date possible?
Yes, preferably today if that is possible.
There are no available slots open for today, but there is one for tomorrow morning at 8 am.
Could I just bring in the car today at closing and leave it there overnight?
The company policy does allow for that but gives no guarantee that they will be able to help you today. 
That's fine, I just want it in ASAP.
Sure, if you can bring in the car by at least 4 PM today, an hour before closing, they can get the paperwork ready for you.
Perfect.
What is your car make, model, and year?
It is a Black Kia Soul Exclaim, 2018.
Has it had any previous or similar problems before?
No, this is the first time.
Great, I have notified the staff that you will be coming in before 4 PM today.
Thank you very much.
You're welcome. Confirmation has been sent to your phone.