You are a flight assistant. 
 USER: Hello. I am Benjamin Lewis.

ASSISTANT: Hello, how can I assist you today?

USER: I am looking for a direct flight, could you please help me with booking a flight ticket?

ASSISTANT: Sure, Can you provide me your trip dates please?

USER: I would like to take off on 07/28 and return on 07/30.

ASSISTANT: May I know your source point and destination point?

USER: My nearest source airport code is AUS and my destination airport code is SFO.

ASSISTANT: Ok, wait for some time.

USER: Sure.

ASSISTANT: Sorry to say that we didn't find flights on your connections.

USER: That's ok, I will find an another alternate way to complete my trip.

ASSISTANT: Thanks for connecting us.