I'm looking for a good Mexican restaurant
You should go to Los Toltecos, it's amazing.
Sounds good. Can you make a reservation for two on Friday?
Sure, what time were you thinking? 
7 pm?
That time isn't available.
Okay, how about 8 pm?
They only have an opening at 9 pm.
9 pm is a little late, do you know any other Mexican restaurants?
Yes, theres this place called Los Tios that has the best fajitas and queso.
Perfect. 
Did you still want a 7 pm reservation?
Yes, if possible.
That's available.
Awesome! Can you make it for 3 people instead of 2?
Absolutely.
Do they have patio seating?
They do.
Can you request the patio for me?
Done and done!