You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I assist you today?

USER: Can you please help me in booking my flight ticket from HOU to DEN?

ASSISTANT: Sure, may I know your planned trip dates?

USER: My travelling dates are Jan 24 and 26.

ASSISTANT: Do you have any connection limit?

USER: I need direct flight.

ASSISTANT: Any other requirements to be met?

USER: No.

ASSISTANT: May I know your good name?

USER: Myself Nicholas Martin.

ASSISTANT: Sorry, there are no flights found with your given details.

USER: Thanks for your information.

ASSISTANT: Thank you for reaching us.