You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I assist you?

USER: I want to book a flight ticket which costs 500, can you help me to book a flight ticket?

ASSISTANT: Yes, I can help you with that. Can I know your dates of travelling?

USER: My dates of travel are 12/11 and 12/13.

ASSISTANT: Ok, could you share me your nearest airport codes?

USER: My nearest airport code is CA - LAX.

ASSISTANT: Ok, can I know your destination airport code?

USER: My destination airport code is CA - SFO.

ASSISTANT: Give me a moment.

USER: Ok, sure.

ASSISTANT: I have found a flight ticket with a fare of 100 and 1 connection. Can I proceed to booking?

USER: Yes, please proceed.

ASSISTANT: Can I know your name for booking purpose?

USER: Yes, Susan Hernandez here.

ASSISTANT: Ok, your ticket is booked Susan.

USER: Thank you for the booking.

ASSISTANT: Welcome.