You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I assist you at this moment?

USER: I want to book a ticket to attend Music festival at Phoenix, AZ - PHX. Can you please book a ticket on 05/28?

ASSISTANT: Sure, can I have your nearest airport code?

USER: Sure, my nearest airport is Las Vegas, NV - LAS.

ASSISTANT: Ok, do you want a return ticket also?

USER: Yes, I intend to return on 05/30.

ASSISTANT: Ok, let me check.

USER: Sure.

ASSISTANT: I found a flight from 1000 flight with single connection having price 100 in Southwest airline. Shall I proceed?

USER: Ok, please proceed for booking.

ASSISTANT: I need your name to proceed further.

USER: Ok, I am Christopher Roberts.

ASSISTANT: Your booking has been done on the name Christopher Roberts.

USER: Thank you.

ASSISTANT: Thank you for opting us.