You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I aid you?

USER: I am planning to visit Lake Merritt at Oakland, could you please help me with booking a flight ticket from ORD to OAK?

ASSISTANT: Sure, can you share your trip dates?

USER: I would like to depart on Mar 4th and return on Mar 6th.

ASSISTANT: Do you have any preferences?

USER: I am looking for a connecting flight. And make sure that my depart time must be evening.

ASSISTANT: May I know your name?

USER: I am Catherine King.

ASSISTANT: There is a connecting flight with number 1008 in airline AA, the fare is 200 in economy class. Can I book it?

USER: Please confirm the booking.

ASSISTANT: Your ticket is reserved.

USER: I really appreciate your help, thank you for your service.

ASSISTANT: Thank you for opting us.