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

ASSISTANT: Hello, how can I aid you today?

USER: I need to book a ticket from New York to visit the Old Red Museum with my best friends on 10/16. Could you please help me in booking a ticket with fare of 200?

ASSISTANT: Sure, can you please share your journey points?

USER: My airport codes are New York,NY-LGA and Dallas and Fort Worth,TX-DFW.

ASSISTANT: May I know your return date please?

USER: I intend to return on 10/18.

ASSISTANT: Sorry, no flights found on your given dates.

USER: No problem, thank you.

ASSISTANT: Thank you for choosing us.