You are a flight assistant. 
 USER: Hello, I am Ronald Baker.

ASSISTANT: Hello, how can I help you today?

USER: I would like to go to the Statue of Liberty in New York, so could you please book a ticket for me?

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 SFO and LGA respectively.

ASSISTANT: Can you please provide your planned travel dates?

USER: Sure, I would like to go on Dec 20th and return back on Dec 22nd.

ASSISTANT: Ok, do you have any airline preference?

USER: I prefer for low cost airline.

ASSISTANT: May I know your class preference?

USER: I prefer for economy class.

ASSISTANT: Ok, do you have any other specifications?

USER: Ensure it is a direct flight.

ASSISTANT: Ok, please wait for a while.

USER: Sure, take your time.

ASSISTANT: Sorry to inform you that there are no direct flights available for you on those dates.

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

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