Hello.
Hello, How can I aid you?
I am Richard Thompson, I want to book a flight ticket with price limit of 500.
Sure, May I  Know your travelling dates?
My departure day is 12/05, return day is 12/07. Connections limit is one.
Ok, Can you provide ma the airport codes?
My source and destinations are IL-ORD, TX-AUS.
Ok, wait a minute.
Sure.
Thanks for waiting. Unfortunately, There is no flight found with your request.
No problem, thanks for your service.
Ok, Thanks for contacting us.