You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Rebecca Young.

ASSISTANT: How can I help you at this moment?

USER: Can you please help me to book a flight ticket from OAK to DTW?

ASSISTANT: I am here to help you with that, may I know your travelling dates?

USER: My travelling dates are Sept 06 to Sept 08.

ASSISTANT: Do you have any specifications?

USER: I need a halt in my journey.

ASSISTANT: Sorry to say this, no flights are available on your desired route.

USER: No problem, thanks for your information.

ASSISTANT: Thank you for reaching us.