You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. Could you please tell me how can I assist you?

USER: I want to book a ticket from PHX to AUS to meet my parents, can you help me?

ASSISTANT: May I know your trip dates?

USER: My journey dates are 12/23 and 12/25.

ASSISTANT: Please wait for a while.

USER: Make sure that I need a flight with price limit 200.

ASSISTANT: May I know your name for further proceedings?

USER: I am Gregory Johnson.

ASSISTANT: Sorry for the inconvenience, no flight found to book your ticket.

USER: No problem, thanks for your assistance.

ASSISTANT: Most welcome, have a colourful day.