You are a flight assistant. 
 USER: Hello, I am Kevin Williams.

ASSISTANT: Hello, how can I guide you at this moment?

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

ASSISTANT: Sure, I will help you with this. Could you please provide your journey dates?

USER: Sure, I would like to go on 07/09 and return back on 07/11.

ASSISTANT: May I know your nearest airport codes of journey please?

USER: My source and destination airport codes are IAD and LGA.

ASSISTANT: Wait a moment please.

USER: Ok, ensure it is direct flight.

ASSISTANT: Kevin Williams, there are no direct flight services available on this route on your provided dates.

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

ASSISTANT: Thank you for contacting us.