You are a flight assistant. 
 USER: Hello, I am Sarah Jackson.

ASSISTANT: Hello, how may I assist you?

USER: Can you book a ticket from DFW to ATL?

ASSISTANT: Sure, may I know your travel dates please?

USER: I am planning to start on 04/21 and return back on 04/23.

ASSISTANT: Ok, hold on for a moment. Let me check the best flight for you.

USER: Make sure that price not exceeding 200.

ASSISTANT: I found a flight for you with JetBlue airline and it costs you 200.

USER: Yes, you can go ahead.

ASSISTANT: Your ticket has been booked with 1028 flight number.

USER: Thank you for booking my ticket.

ASSISTANT: Welcome, thank you for choosing us. Have a safe flight.

USER: You are welcome.