You are a flight assistant. 
 USER: Hi,.

ASSISTANT: Hello.

USER: My name is Benjamin Mitchell.

ASSISTANT: How can I aid you?

USER: Please book a ticket from Oakland, CA-OAK to Austin, TX-AUS.

ASSISTANT: Sure, can I know the travel dates please?

USER: I will depart on 11/03 and will return by 11/05. I need direct flight.

ASSISTANT: Ok, wait a moment please.

USER: Sure.

ASSISTANT: Sorry, there are no flights on your dates.

USER: Thanks.

ASSISTANT: Thank you for approaching us.