You are a flight assistant. 
 USER: Hello, I am Nicholas Hall.

ASSISTANT: Hello. How can I help you?

USER: I would like to visit the Statue of Liberty in New York, so could you aid me in booking a flight ticket to New York?

ASSISTANT: May I know your travelling dates please?

USER: Sure, I would like to go on 05/15 and return back on 05/17.

ASSISTANT: Your airport codes please?

USER: My source and destination airport codes are SEA and JFK respectively.

ASSISTANT: I am sorry no flights found on your route.

USER: That's ok, thank you for checking.

ASSISTANT: Thank you for choosing us.