You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you?

USER: I am Jacob Lee, book a flight ticket for from TX-DFW to visit a auction house in Los Angles, CA-LAX. I need a flight under price of 200.

ASSISTANT: May I know your journey dates?

USER: I will travel on 07/09 and return on 07/11.

ASSISTANT: Please wait for a moment.

USER: Sure.

ASSISTANT: I found a Delta airline, flight number: 1008, price: 100.

USER: It is good, please proceed with booking.

ASSISTANT: Your flight ticket has been confirmed.

USER: Thank you for your service.

ASSISTANT: Thank you.