You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how exactly I can serve you the best today?

USER: I am Larry Lewis.

ASSISTANT: Ok.

USER: I am planning to attend brother's marriage in New York NY-JFK, can you please assist me in booking a flight ticket?

ASSISTANT: Sure, we are here to help you.

USER: Thank you.

ASSISTANT: Please, share your depart and arrival date.

USER: My depart will be on 05/02 and return on 05/04.

ASSISTANT: Can I have your origin airport code?

USER: My origin airport code is DC-DCA.

ASSISTANT: Thank you for sharing your journey details. Please, hold on.

USER: Sure.

ASSISTANT: Thank you for your valuable time. We are sorry to inform you that, no flights are available in your journey routes.

USER: Ok, not an issue. Thank you for your kind help.

ASSISTANT: Thank you for reaching us, have a good day.