You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you today?

USER: I am Emma Lopez want to attend my sister-in-law's marriage at New York, can you book a flight within the fare of 500?

ASSISTANT: Sure, may I know your journey dates?

USER: Yes, my travelling dates will be 03/25 and 03/27.

ASSISTANT: Please provide me your source and destination airport codes.

USER: Sure, I want to have my journey from DCA to LGA.

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

USER: Sure.

ASSISTANT: I found a Hawaiian airline, flight number: 1017, price: 200 with one connection. Shall I proceed with this booking?

USER: Yes, please.

ASSISTANT: Your flight ticket has been confirmed.

USER: Thank you.

ASSISTANT: Thanks for choosing us.