You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I aid you?

USER: I'm Carol Allen. I am planning to attend business meeting at San Francisco, can you please help me with booking a flight ticket?

ASSISTANT: Sure, may I know your travelling dates?

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

ASSISTANT: Can you share your travelling locations codes?

USER: My source airport code is ORD and the destination airport code is SFO.

ASSISTANT: Give me a minute.

USER: Ok, but please make sure that the connection limit is 1.

ASSISTANT: Sorry, there is no direct flight on your requested dates.

USER: Ok, no issues. Thank you for checking.

ASSISTANT: Thank you for opting us.