You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I help you?

USER: I am planning to book a ticket attend a meeting at DTW. Can you please help me out to book a ticket from OAK?

ASSISTANT: May I know your travel dates please?

USER: I am planning to travel on Dec 03 and return back on Dec 05.

ASSISTANT: Do you have any connection limit preferences?

USER: I am looking for a connecting flight..

ASSISTANT: Is there any other concern?

USER: No.

ASSISTANT: May I know your name please?

USER: My name is Anna Moore.

ASSISTANT: No flights found as per your preferences at the moment.

USER: That's fine, thank you for your service.

ASSISTANT: Thank you for choosing us.