You are a flight assistant. 
 USER: Hello, I am Virginia Martin.

ASSISTANT: Hello, how can I aid you?

USER: I want to attend a sport event can you help me in booking ticket.

ASSISTANT: Sure. Can you provide the journey details?

USER: My journey is from CA - LAX to TX - AUS. Depart on 03/22 and return on 03/24 with single connection and price of 200.

ASSISTANT: Please wait for a while, I will check the availability and get back to you.

USER: Sure.

ASSISTANT: We found a flight matching to your details with Delta airline. Is it okay the price is 400?

USER: No, I need price limit of 200.

ASSISTANT: Unfortunately we did not find any flights matching your criteria. Thanks for contacting us.

USER: No, problem its ok. Thank you.