Hello.
user
Hello, how may I assist you?
assistant
I am planning to book a flight ticket to AUS from IAH, can you please help me out?
user
Sure, help me with the trip dates?
assistant
Sure, my  trip dates are Dec 08 and Dec 10.
user
Do you have any preferences?
assistant
Yes, I prefer business class.
user
May I know your name please?
assistant
Sure, my name is Nancy Clark.
user
Sorry, we did not find any flights running in your preferred dates.
assistant
It's ok, thank you for the information.
user
Thank you for opting us.
assistant