You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I assist you?

USER: I am planning to visit Oakland, will you help me in booking the flight ticket from LAX to OAK?

ASSISTANT: Sure, I am here to help you with that, can I know your travel dates?

USER: My preferable journey dates are June 09 and June 11.

ASSISTANT: Do you need any flag stop in between journey?

USER: I need a flight with single connection.

ASSISTANT: Is there any other requirements?

USER: No, thank you for asking.

ASSISTANT: May I know your name please?

USER: Myself Helen Harris.

ASSISTANT: We are regret to inform you that there is no flights are found with your specifications.

USER: Ok, not an issue. Thank you for your information.

ASSISTANT: Thank you very much for approaching our agency.