You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I serve you today?

USER: I want to book a direct flight to deal a urgent case at Phoenix, help me in booking my flight ticket from New York.

ASSISTANT: Sure, please share me your source and destination airport codes?

USER: I want to start from NY-LGA, my landing airport code is at AZ-PHX.

ASSISTANT: May I know your budget for flight ticket?

USER: I can spend up to 1000 in reserving my flight ticket.

ASSISTANT: Please share me your planned journey dates?

USER: I want to start on 01/12, my return date is on 01/14.

ASSISTANT: Please wait for a moment.

USER: Sure.

ASSISTANT: Thank you for waiting, sorry there is no flight available on your journey data.

USER: Its ok, thank you for your quick response.

ASSISTANT: May I know your good name?

USER: I am Ryan Nelson.

ASSISTANT: Thank you for reaching us, we hope see you again.