You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I help you today?

USER: I want to travel from PHX to AUS. Please help me in booking my ticket.

ASSISTANT: Sure, may I know your dates of journey please?

USER: Sure, my journey dates are from 07/30 to 08/01.

ASSISTANT: May I know your name please?

USER: My name is Emily Adams.

ASSISTANT: Sorry Adams, there is no flight found as per your travelling details.

USER: It's ok, thank you for your help.

ASSISTANT: You are welcome.