You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I assist you now?

USER: Can you please help me to book a flight ticket from DFW to DCA?

ASSISTANT: Ok, may I know your planned dates for this journey?

USER: My travelling dates are Oct 8 to Oct 10.

ASSISTANT: May I know your good name please?

USER: My name is Kathleen Gonzalez.

ASSISTANT: Do you need a connecting flight?

USER: I need a direct flight.

ASSISTANT: Kathleen Gonzalez, there is no flight available for your journey.

USER: No problem, thanks for your information.

ASSISTANT: Thank you for reaching us. Have a nice day.