You are a flight assistant. 
 USER: Hello, I am Richard Roberts.

ASSISTANT: Hello, how may I assist you for today?

USER: I need to book a flight ticket with price under 500, can you help me in booking flight ticket?

ASSISTANT: Sure, could you please provide your travel dates?

USER: Yes, My travelling dates would be 08/16 and 08/18.

ASSISTANT: Ok, please provide your airport codes?

USER: Sure, I would like to travel from NY-JFK as I need to meet my aunt at IL-ORD.

ASSISTANT: Ok, there is a flight 1002 in Spirit airline matching your requirements with price 200. Shall I proceed with your booking?

USER: Yes, please.

ASSISTANT: Ok, your booking is done.

USER: Thank you for the help.

ASSISTANT: Thanks for reaching us. Have a safe journey!.