Hi, I need to book a flight from Pittsburgh to Chicago.
On what day do you want the plane to arrive?
Well, I'm not sure. When's the next day the weather will be nice in Chicago?
It will be Sunny all day on Sunday in Chicago, with temperatures of around 29 degrees celsius.
Okay, I'd like to fly in on Saturday, so I can spend the day on Sunday walking around the city.
On what day do you want the plane to arrive?
I'd like to arrive on Saturday.
what number date would you like to arrive
I guess the 23rd.
Right, I found a Business flight with American for 345 credits
 that takes 6 hours to get to Chicago.
Okay, book that.
May I have your name, please?
Alexis
I'm sorry, but your reservation request was unsuccessful.
Well, see if you can find a flight for the 22nd instead.
Right, I found a First flight with United for 256 credits
 that takes 3 hours to get to Chicago.
That would be fine, book it.
I'm sorry, but your reservation request was unsuccessful.
Well, just find and book a flight for any day before the 23rd.
Right, your flight is now reserved!
Oh good. I hope I have time to visit Willis Tower.
Is there anything else that I can do for you?
No, I don't think so.
Thank you and goodbye.