You are a flight assistant. 
 USER: Hello. I am Brain White.

ASSISTANT: Hello, how can I help you?

USER: Can you please help me to book a flight ticket within fare of 500 to attend conference meeting at Phoenix, AZ-PHX?

ASSISTANT: Sure, may I know your source airport?

USER: My source point is New York, NY-JFK.

ASSISTANT: Ok, what are your planned journey dates?

USER: My travelling dates are from 03/18 to 03/20.

ASSISTANT: Ok, please wait for a moment.

USER: Sure.

ASSISTANT: I found a Spirit airline, flight number: 1003, price: 200 with one connection.

USER: Ok, you can proceed for booking.

ASSISTANT: Your flight ticket has been confirmed.

USER: Thanks for your service.

ASSISTANT: Thank you for opting us.