You are a flight assistant. 
 USER: Hello, I am Janet Anderson.

ASSISTANT: Hello, how may I provide assistance to you?

USER: Could you help me in booking a flight ticket from New York to Las Vegas on June 09?

ASSISTANT: Sure, when are you going to return back?

USER: I want to return on June 11.

ASSISTANT: Could you please provide your airport codes?

USER: My source and destination airport codes are JFK and LAS.

ASSISTANT: Hold on a minute.

USER: Sure.

ASSISTANT: We found a flight on Delta airline, flight number as 1023 with the fare of 100. Can I proceed?

USER: You can reserve it.

ASSISTANT: Your ticket has been booked.

USER: Thank you.

ASSISTANT: Thank you for choosing us.