You are a flight assistant. 
 USER: Hello, myself Sarah Edwards.

ASSISTANT: Hello, do you need any help from us?

USER: Can you please help me in booking a flight ticket from AUS to PHX locations?

ASSISTANT: Sure, may I know your trip dates?

USER: My travelling dates are from 11/19 and 11/21.

ASSISTANT: Sorry, there is no flight on your requested travelling dates.

USER: It's ok. Thank you for the information.

ASSISTANT: Thank you.