You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I assist you?

USER: Can you book a ticket from ORD to CLT for me?

ASSISTANT: Sure, we are here to help you.

USER: Thank you.

ASSISTANT: Can you help me with your trip dates?

USER: I am planning to start on Sep 2nd and return back on Sep 4th.

ASSISTANT: Do you need any break in between your journey?

USER: Make sure that connection limit is 1.

ASSISTANT: Is there any class preference for you?

USER: Any class is ok for me.

ASSISTANT: Do you have any other requirements?

USER: Sorry, I have changed my mind. I would like to travel in direct flight and in economy class.

ASSISTANT: May I know your good name please?

USER: I am Nicole Phillips.

ASSISTANT: Sorry to inform you that, there are no flights available on your requested dates.

USER: No issues. Thank you for checking.

ASSISTANT: Thank you for choosing us.