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

ASSISTANT: Hello. How can I assist you?

USER: I want to book a flight ticket on Feb 16th, please help me out.

ASSISTANT: Sure. When would you like to return?

USER: My return date is on Feb 18th.

ASSISTANT: May I know at what price you are looking for ticket fare?

USER: I need the ticket under price 5000.

ASSISTANT: Please let me know your origin  and destination airport codes?

USER: My source code is DEN and destination code is CLT.

ASSISTANT: We found a AA airline, flight number:1022 and the price is 100.

USER: Please proceed.

ASSISTANT: Your flight ticket has been confirmed.

USER: Thanks for the reservation.

ASSISTANT: Thank you for consulting us.