You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I assist you?

USER: Can you please help me to reserve a plane ticket from DEN to reach IAH?

ASSISTANT: Sure, may I know your trip dates?

USER: Thank you for considering my request. My preferable travel dates are Mar 09 and Mar 11.

ASSISTANT: May I know your name?

USER: My name is Debra Turner.

ASSISTANT: Do you want any connection between my trip?

USER: I would like to travel in a direct flight.

ASSISTANT: Do you need any other requirements?

USER: No.

ASSISTANT: We regret to inform you that there is no flights going on your way.

USER: It's ok, not a problem with that. Thank you for searching the flights.

ASSISTANT: Thank you for contacting us.

USER: Most welcome.