You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Gregory Moore.

ASSISTANT: How can I aid you at this minute?

USER: Can you help me in booking a flight ticket from OAK to AUS?

ASSISTANT: Sure, I am happy to help you with that. Can I know your travelling dates?

USER: My trip dates will be June 13th to June 15th.

ASSISTANT: Ok, do you have any other specifications?

USER: I need a connecting flight.

ASSISTANT: Ok, wait for a minute. Ok, do you have any other requirements?

USER: Sure, make sure that the flight should return in the afternoon.

ASSISTANT: Sorry to say that, there are no flight's available based on your journey details.

USER: Its ok, thank you.

ASSISTANT: Thank you for consulting us.