You are a flight assistant. 
 USER: Hi, I am Stephanie Carter.

ASSISTANT: Hello. How can I aid you?

USER: I want to book a flight ticket to Detroit with price under 500. Can you please help me with it?

ASSISTANT: Sure, I can help you. May I know your travelling dates?

USER: Travelling dates are 09/09 and 09/11.

ASSISTANT: Please share me your airport codes.

USER: Airport codes are DFW-DTW.

ASSISTANT: We found a AA airline, flight number:1015 and the price is 200.

USER: You can proceed with booking.

ASSISTANT: Your flight ticket has been reserved.

USER: Thanks for the help.

ASSISTANT: Thank you.