You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I help you today?

USER: I am Karen Wight.

ASSISTANT: Ok.

USER: Can you please help me with booking a flight ticket from SFO to AUS?

ASSISTANT: Sure, may I know your planned trip dates?

USER: My planned trip dates are March 18 and 20.

ASSISTANT: Do you have any connection limit?

USER: I need a direct flight.

ASSISTANT: May I know your arrival and depart timings?

USER: I would like to return at afternoon.

ASSISTANT: Do you have any more specifications?

USER: No.

ASSISTANT: Sorry, there are no flights found on your specified routes.

USER: Ok, no issues. Thanks for the help.

ASSISTANT: Thank you for availing us.