You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: Gary Evans here.

ASSISTANT: How can I aid you?

USER: There is a meeting in OAK, so I want to book a ticket from AUS.

ASSISTANT: May I know your dates of journey?

USER: I am travelling on 08/06 and return on 08/08.

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

USER: No issue, thanks for your information.

ASSISTANT: Thank you for reaching us.