Hey, I'm going to need a ride at midnight from campus.
Sure thing. What building are you in now? Are you headed home?
I'm in the Electrical Engineering building, but anywhere along that stretch of Northwestern is fine. No, I'm going to Adam's apartment at The Lodge.
Is Adam with you? 
Yes, we'll need a car for two.
Do you want an Uber or Lyft?
Uber is fine. I think I have an account credit.
What kind of car do you want?
What are my options right now?
There are just two available, Uber X and Uber XL.
What are the prices?
$10.39 for X, $14.58 for XL.
X is fine, so long as it's not a car full of other riders.
It does not look like the car is carrying other passengers right now. 
Great. Can you go ahead and request that ride for me?
Will do. An Uber X will pick you guys up outside EE at midnight.
Thanks so much. Do you have car info?
It's a white Audi A4. Purdue plates, 432 13S
Thanks!
No problem. You can double check all of this on your phone.