You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you?

USER: I need to surprise my friend on the occasion of his birthday. Can you help me to book the ticket?

ASSISTANT: Sure, can you please provide me your journey details?

USER: My airport codes are LAX- DCA. I need to fly on 03/14. Return date is 03/16.

ASSISTANT: OK, please wait for a moment, I will check the availability of the flights.

USER: OK.

ASSISTANT: Thanks for waiting, I found a flight with your given details. The flight details are, flight number: 1019, airline: UA, price: 100.

USER: OK, You can go ahead to book the ticket.

ASSISTANT: OK, may I know your name please?

USER: My name is Nicholas Rodriguez.

ASSISTANT: OK, your flight ticket has been confirmed.

USER: Thank you.

ASSISTANT: Thank you for choosing us.