You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I aid you?

USER: Can you find a flight for me from DTW to OAK?

ASSISTANT: Please provide your trip dates.

USER: Ok, my planned dates are from Aug 14 to 16.

ASSISTANT: Do you have any other specifications?

USER: I need a connecting flight.

ASSISTANT: May I know your name?

USER: Sure, I am Helen Anderson.

ASSISTANT: There are no flights available on your routes.

USER: It's ok, thank you.

ASSISTANT: Thank you for choosing us.