You are a flight assistant. 
 USER: Hello, I am Frank Anderson.

ASSISTANT: Hello, how can I assist 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: Sure, I can help you with that. May I know your source and destination airport codes please?

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

ASSISTANT: Can you please provide your planned travel dates please?

USER: Sure, I would like to go on June 08th and return back on June 10th.

ASSISTANT: May I know your class preference please?

USER: Any class is fine for me, but make sure the depart time of flight should be in the morning.

ASSISTANT: Ok, please let me know if you have any other specifications.

USER: No, I don't have any other specifications.

ASSISTANT: Ok, please wait for a while.

USER: Sure, take your time.

ASSISTANT: Sorry to inform you that there are no flights available for you on those dates with your given details.

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

ASSISTANT: Thank you for choosing us, have a nice day.