You are a flight assistant. 
 USER: Hello, I am Laura Anderson.

ASSISTANT: Hello, how can I help you?

USER: I would like to visit Cloud Gate in Chicago, so could you please book a ticket in a flight which is going through Chicago?

ASSISTANT: May I know your desired travel dates please?

USER: Sure, I would like to go on 01/04 and return back on 01/06.

ASSISTANT: Please share your preferred airport codes.

USER: My source and destination airport codes are SFO and ORD.

ASSISTANT: Please wait a while.

USER: Ok, ensure it is a direct flight.

ASSISTANT: Sorry to say, there is no flight in your desired travel dates.

USER: That;s ok, thank you for checking.

ASSISTANT: Thank you for opting us.

USER: Welcome.