You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I assist you?

USER: Can you please help me in booking my flight ticket from OAK to DTW?

ASSISTANT: Sure, we are here to help you. May I know your travel dates?

USER: Thank you. My travelling dates are from 06/07 to 06/09.

ASSISTANT: Do you need any way station in your journey?

USER: I don't need any way station.

ASSISTANT: Is there any class preference for you?

USER: No.

ASSISTANT: Do you have any other requirements?

USER: No.

ASSISTANT: May I know your good name please?

USER: Myself Christine Rodriguez.

ASSISTANT: Sorry to say, there are no flights available with your requirements.

USER: It's ok, thank you.

ASSISTANT: Thank you for choosing us.