You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I assist you at this moment?

USER: I would like to travel from SFO to AUS, can you help me to book a flight ticket?

ASSISTANT: Sure, I am here to help you with that. Can you please share your planned travel dates?

USER: My travel dates are Mar 27 and Mar 29.

ASSISTANT: Would you like to travel in a connecting flight or direct flight?

USER: I prefer connecting flight.

ASSISTANT: Do you have any other specifications?

USER: I would like to return back in the afternoon time.

ASSISTANT: May I know your name please?

USER: I am Helen Lewis.

ASSISTANT: Sorry to say that, there are no flights found on this route as per your travel dates.

USER: No problem, thank you for the information.

ASSISTANT: Thank you for reaching us, have a great day.