You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I aid you?

USER: Myself Ronald White. I am planning to travel Oakland to meet my cousin sister. Can you please help me in booking the ticket from DTW to OAK?

ASSISTANT: Sure, I am hear to help you out. May I know your travelling dates please?

USER: I will take-off 03/03 and again I will return back on 03/05.

ASSISTANT: Wait a moment please.

USER: Sure, I will wait for your response.

ASSISTANT:  Ronald White, there are no flights available in your route.

USER: Not a big deal, thank you very much for your service.

ASSISTANT: Thank you for reaching us.