You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I provide assistance to you?

USER: I am planning to go for a small vacation with my friends in DTW. Can you please aid me for booking from OAK?

ASSISTANT: Sure, I am happy to help you in booking.

USER: Thanks for accepting my request.

ASSISTANT: When would you like to depart and arrive?

USER: I would like depart on Dec 6 and return on Dec 8.

ASSISTANT: Do you have any connection limit?

USER: I prefer to travel in a connected flight.

ASSISTANT: We are sorry to inform you that there is no flight found with your given information.

USER: OK, thanks for your information.

ASSISTANT: Thank you for availing us. May I know your name please?

USER: Sure, Gregory King is my name.

ASSISTANT: Thank you.

USER: You are welcome.