Hello.
user
Hello. How can I assist you now?
assistant
Can you help me to book a flight ticket from LAX to ORD?
user
Sure, can I have your travel  dates please?
assistant
My travel dates are Sept 15 and Sept 17.
user
Ok,  please let me know your  preferable timings of your journey.
assistant
I would like to return back in the evening time.
user
Do you have any other specifications?
assistant
I prefer direct flight.
user
Can I have your good name please?
assistant
I am Mark Jones.
user
Sorry to inform you that no direct flight is available to you on your  planned dates.
assistant
No problem, thank you for the information.
user
Thank you for choosing us, have a good day.
assistant