You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I assist you today?

USER: I am looking for a direct flight from DCA to JFK, can you please help me to book a flight ticket?

ASSISTANT: Sure, let me know your planned journey dates?

USER: My travelling dates are Oct 30 and Nov 01.

ASSISTANT: Is there any other preferences?

USER: No.

ASSISTANT: Can I know your name?

USER: My name is Anna Thomas.

ASSISTANT: Thanks for your details, there is no flight found on your desired journey routes.

USER: No problem, thank you for your information.

ASSISTANT: Thank you for availing us.