You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I help you with today?

USER: I'm planning for a holiday trip to Washington with my friends.Can you please help me to book a ticket?

ASSISTANT: Sure, I can help you with that. May I know your name to proceed further?

USER: I'm Joseph Green.

ASSISTANT: Joseph, can you please help me with the source and the destination airport codes?

USER: My source is LAX and destination is DCA.

ASSISTANT: Ok, could you please provide your travelling dates?

USER: Yes, my departure date is 12/06 and return date is 12/08.

ASSISTANT: Ok, let me check for the availability of flight.

USER: ok. Please make sure the price limit is 200.

ASSISTANT: Joseph, there is a flight available at your requested date with price 100. Would you like me to proceed the booking?

USER: That's great.Please book the ticket.

ASSISTANT: Sure. Your booking is confirmed.Your flight number is 1029 and the airline is JetBlue. Have a great journey.

USER: Thank you.

ASSISTANT: You are welcome. Thank you for contacting us.