You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I help you?

USER: Can you aid me in booking a flight ticket from DTW to OAK?

ASSISTANT: Can you please share your journey dates?

USER: I am planning to start on Jan 6th and return back on Jan 8th.

ASSISTANT: May I know your good name?

USER: I am Christopher Lewis.

ASSISTANT: Do you require any stopover?

USER: Make sure that connection limit is 1.

ASSISTANT: Is there any class preference?

USER: Any class is fine for me.

ASSISTANT: Do you have any other requirements?

USER: No.

ASSISTANT: Sorry Lewis, there is no flights running currently with your specified dates to travel.

USER: No issues. Thank you for checking.

ASSISTANT: Thank you for choosing us.