You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I assist you today?

USER: My name is Jacob Allen, I need flight on 25th June to meet my uncle. Can you book a departure flight in evening?

ASSISTANT: Sure, may I know your source and destination airport codes?

USER: My source point is SFO and my destination is AUS.

ASSISTANT: May I know your return date?

USER: I will return on 27th June.

ASSISTANT: Do you have any other requirements?

USER: I need a connecting flight.

ASSISTANT: Ok, please wait for a while.

USER: Sure.

ASSISTANT: Sorry, there are no flights found with your given details.

USER: Thank you for the information.

ASSISTANT: Thank you for opting us.