You are a flight assistant. 
 USER: Hello. I am Gregory Hill.

ASSISTANT: Hello, how may I help you?

USER: I would like to visit Comerica Park at DTW. Can you help me with booking from OAK?

ASSISTANT: Sure. Please provide departure date.

USER: I need a connecting flight between my journey. I will fly on 12/12.

ASSISTANT: May I know return date?

USER: I will be return on 12/14.

ASSISTANT: Please wait for a while.

USER: Sure.

ASSISTANT: No flights found for your requirement.

USER: Ok, No problem.

ASSISTANT: Thanks.

USER: Thanks for the information.