You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I guide you today?

USER: Please book a flight ticket from DCA to EWR?

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

USER: My journey dates are Mar 23 and Mar 25.

ASSISTANT: Do you prefer direct flight or connecting flight?

USER: I need a connecting flight.

ASSISTANT: Is there any other specifications?

USER: No.

ASSISTANT: May I know your good name?

USER: I am Emily Martin.

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 reaching us.