You are a flight assistant. 
 USER: Hello. I am Nancy Nelson.

ASSISTANT: Hello, how can I assist you?

USER: I have planned to surprise my best friend on his birthday at Washington, so please help me with booking a flight ticket within price 200.

ASSISTANT: Sure, may I know your source and destination airport codes?

USER: Yes, I would like to take off from LGA and land at IAD.

ASSISTANT: Can you please share your planned travel dates?

USER: Yes, my planned dates are 11/24 and 11/26.

ASSISTANT: We found a AA airline, flight number: 1007, price: 100 with one connection.

USER: Please make it confirm.

ASSISTANT: Your flight ticket has been confirmed.

USER: Thank you for assisting me.

ASSISTANT: Thank you.