You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you?

USER: I am Anna Clark. I want to book a flight ticket with a price limit of 500.

ASSISTANT: Ok, may I know your journey dates?

USER: My departure is 09/21 and my return date on 09/23.

ASSISTANT: Can you please provide me your source and destination airport codes?

USER: I am planning to attend my sister birthday in TX - DFW and my origin from CA - LAX. I need a connecting flight.

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

USER: Sure.

ASSISTANT: Thanks for waiting, I found a JetBlue airline, flight number: 1000, price: 400 with one connection.

USER: You can proceed to booking.

ASSISTANT: Your flight ticket has been confirmed.

USER: Thanks for your service.

ASSISTANT: Thanks for choosing us.