Hello.
user
Hello, how may I help you?
assistant
Can you please help me to book a flight from IAH to DFW?
user
Sure, may I know your trip dates please?
assistant
My trip dates are Sept 2nd and 4th.
user
Do you have any other requirements?
assistant
I want to return in afternoon time.
user
Ok, can I know your name?
assistant
My name is Larry king.
user
Ok, please wait for a while.
assistant
I prefer to travel in economy class.
user
Sorry Larry, there is no flight available as per your request.
assistant
No problem, thank you for your help.
user
Most welcome.
assistant