You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, How can I help you?

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

ASSISTANT: Sure, May I know your travelling dates?

USER: My journey dates are from Apr 12 to Apr 14.

ASSISTANT: Do you have any connection limit?

USER: I need a flag stop in between journey.

ASSISTANT: Any other preferences?

USER: Sorry, I need direct flight.

ASSISTANT: May I know your name?

USER: My name is Justin Harris.

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

USER: Ok, that's not a problem. Thanks for your information.

ASSISTANT: Thank you.