You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, How can I assist you?

USER: I am planning my trip to visit Austin. Can you please help me in reserving the ticket from DEN to AUS?

ASSISTANT: Sure, May I know the journey dates?

USER: I am willing to take-off Nov 5 and again I will return back on Nov 7.

ASSISTANT: Do you have any connection limit?

USER: I am flexible to travel in direct flight.

ASSISTANT: Do you have any return time preference?

USER: I am comfort with any time to return.

ASSISTANT: Is there any other requirements?

USER: My class preference is economy.

ASSISTANT: May I know your name?

USER: Myself Mark Edwards.

ASSISTANT: Please wait a minute.

USER: Sure, I will wait for your response.

ASSISTANT: Sorry, No flights found with your preferable dates.

USER: Not a big issue, anyhow thank you very much for your information.

ASSISTANT: Thank you for availing us.