Hello.
user
Hello, how may I guide  you at this moment?
assistant
I want to book a flight ticket from DEN to ORD. Can you find a flight ticket for me?
user
Sure, I can help you with that. Can I know your trip dates?
assistant
Sure, my planned trip dates are on Aug 29 and return on Aug 31.
user
Ok, please let me know your preferences.
assistant
I need an economy class with the single connecting flight.
user
Ok, can I know your full name please?
assistant
Yes, I am Debra Wright.
user
Sorry to inform you that, there are no flights found in this route with the dates you have given.
assistant
Ok, not an problem. Thank you for your information.
user
You are welcome. Thank you for reaching us.
assistant