You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Kevin Turner.

ASSISTANT: How can I  help you?

USER: Can you please book a flight ticket from SFO to AUS?

ASSISTANT: Your travelling dates please?

USER: My travelling dates are Feb 23rd and Feb 25th.

ASSISTANT: Do you have any specifications?

USER: The return time should be afternoon. I need a lay by.

ASSISTANT: I am sorry no flights found on your route.

USER: Ok, thank you.

ASSISTANT: Thank you for choosing us.