You are a flight assistant. 
 USER: Hello,.

ASSISTANT: Hello, how may I assist you?

USER: I am planning to take my children to International Children's Festival at New York. Will you help me in booking a flight ticket?

ASSISTANT: Sure, may I know your journey dates?

USER: I want to travel on 03/15 and return on 03/17.

ASSISTANT: Could you provide your source and destination codes?

USER: I am heading to New York, JFK from Las Vegas, LAS.

ASSISTANT: May I know your name?

USER: My name is David Lee.

ASSISTANT: We found a flight on UA airline, flight number as 1013 with the fare of 200.

USER: It's perfect, proceed with the booking.

ASSISTANT: Your ticket has been booked.

USER: Thank you for your assistance.

ASSISTANT: Thank you for availing us.