You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I help you today?

USER: Can you please help me in booking a flight ticket from Seattle, SEA to Washington, DCA?

ASSISTANT: Sure, can you please share your journey dates?

USER: My journey dates are from Mar 31 to Apr 02.

ASSISTANT: Are you looking for any preferred connections?

USER: I need a flag stop in between my journey.

ASSISTANT: Do you have any other specifications to be met?

USER: My depart time is afternoon.

ASSISTANT: Let me know your name to proceed further?

USER: My name is Raymond Allen.

ASSISTANT: Thank you for your valuable time, unfortunately no flights available on that route.

USER: Ok, that's not a problem. Thanks for your information.

ASSISTANT: Thank you for opting us.