You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Kevin Smith.

ASSISTANT: How can I help you today?

USER: I am looking for a direct flight, could you please help me with booking a flight ticket?

ASSISTANT: Sure, I will help you with that. Could you please mention your preferable airport code names?

USER: My source airport code is DEN and destination airport code is LAX.

ASSISTANT: May I know your preferable travel dates for booking flight ticket?

USER: I would like to take off on 11/09 and return on 11/11.

ASSISTANT:  Ok, please wait a moment, I will check flight availability.

USER: Sure, take your time.

ASSISTANT: Sorry no flights available in this route as per your requested dates.

USER: That's ok, not an issue.

ASSISTANT: You are welcome.

USER: Anyways, thank you for the information.