You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Patricia Campbell. I am planning to book a ticket to meet my family at OAK. Can you please help me out from AUS?

ASSISTANT: Can you please provide me travelling dates?

USER: I would like to travel on 06/07 and return back on 06/09.

ASSISTANT: Please wait a moment, so that i can check with it.

USER: Sure.

ASSISTANT: sorry Campbell, there are no flights available with your dates.

USER: That's fine. Thank you for your service.

ASSISTANT: Thank you choosing for our agency.