You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I aid you?

USER: Cynthia Rodriguez here. I am planning to book a flight ticket to OAK from DTW, can you please help me out?

ASSISTANT: May I know your journey dates?

USER: Sure, my planned travelling dates are Nov 28 and 30.

ASSISTANT: Is there any class preference?

USER: No.

ASSISTANT: May I know your connection limit?

USER: Sure, I am looking for a flight with 1 connection.

ASSISTANT: Ok, may I know your departure and return timings?

USER: Sure, my return time is afternoon.

ASSISTANT: Ok, please wait for a while.

USER: Ok.

ASSISTANT: Sorry, there are no flights running with your requirements.

USER: It's ok, thank you for the information.

ASSISTANT: Thank you for choosing us.