You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I assist you today?

USER: I am Christine Edwards. To give seminar on social issues, I need to travel from Atlanta to Chicago, ORD. So, please book a flight on 08/02.

ASSISTANT: Sure, may I know your return date?

USER: I intend to return on 08/04.

ASSISTANT: May I know your source point?

USER: The source point is Atlanta, ATL.

ASSISTANT: Do you need a halt in between your journey?

USER: Yes.

ASSISTANT: Sorry to say that, no connecting flights were found with your given details.

USER: Ok, Thank you.

ASSISTANT: Thank you for opting us.