Hello.
user
Hello, how may I aid you today?
assistant
I want to book a flight ticket from DEN to HOU. Can you please help me in that?
user
Sure, please share me your trip dates.
assistant
I will start my journey on Nov 12 and return on Nov 14.
user
 Do you need direct flight or connecting flight?
assistant
I would prefer to travel in direct flight.
user
 For booking, we need your good name. Please mention it.
assistant
Janet Walker here.
user
May I know your class preferences?
assistant
I don't have any class preference.
user
 Sorry to say that, there are no flights available on the routes of your journey.
assistant
Ok, no problem.
user
Thank you for opting us.
assistant
Thank you for checking.
user