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

ASSISTANT: Hello, how may I help you?

USER: Could you help me in booking a flight ticket from New York to Seattle on 08/19?

ASSISTANT: Sure, please share your journey points?

USER: My source and destination airport codes are NY - EWR, WA - SEA.

ASSISTANT: May I know your return date?

USER: I want to return on 08/21.

ASSISTANT: Do you have any specifications?

USER: My price limit is 200.

ASSISTANT: Please wait for a while.

USER: Sure.

ASSISTANT: We found a flight in couple of connections, shall I proceed with the Delta airlines?

USER: You can reserve it.

ASSISTANT: Ok, your ticket has been confirmed with flight number is 1013.

USER: Thank you.

ASSISTANT: Thank you for choosing us.