You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I help you?

USER: I need to buy a plane ticket to reach Los Angeles because I need to present the seminar in the university. Can you please help me to check the flight availability from Phoenix?

ASSISTANT: Sure, can you please share me your source airport codes?

USER: Thank you. The source airport code is PHX.

ASSISTANT: When you are willing to travel?

USER: I am willing to travel on the dates of 09/09 and 09/11.

ASSISTANT: Please wait for couple of minutes.

USER: Ok, take your time and make sure that the price limit is 500 or less.

ASSISTANT: Can you please share me your destination airport code?

USER: Sure, the destination airport code is LAX.

ASSISTANT: Ok. As per your data, I found a flight with Spirit airlines and the ticket fare is 100. Shall I proceed with this?

USER: Yes, I am ok with the details of the this airlines. Please proceed with ticket booking.

ASSISTANT: For booking the ticket. May I know your name?

USER: My name is Stephanie Carter.

ASSISTANT: Carter, your ticket is reserved with the flight-1019.

USER: Thank you for assisting me in booking a plane ticket.

ASSISTANT: you are welcome.