You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I aid you at this moment?

USER: Could you please book a flight ticket from OAK to AUS?

ASSISTANT: May I know your travel dates?

USER: My travel dates are Sept 21 and Sept 23.

ASSISTANT: Is there any connection limit?

USER: I need a single connecting flight.

ASSISTANT: Do you have any other requirements?

USER: I want to return in the afternoon.

ASSISTANT: May I know your name?

USER: My name is Gary Campbell.

ASSISTANT: There were no flights found with your required dates to travel.

USER: Not a problem, thank you for the information.

ASSISTANT: Thank you for choosing us.