You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I help you now?

USER: I want to schedule my trip from ORD to CLT, can you please reserve me a flight ticket?

ASSISTANT: Sure, I am glad to help you with your request. Can you please provide your preferable dates of travelling?

USER: My preferable travel dates are from Feb 5th to Feb 7th.

ASSISTANT: Do you have any class preferences?

USER: No.

ASSISTANT: Any connection limit do you have?

USER: I would prefer a direct flight.

ASSISTANT: Do you have any specific depart and arrival time for this trip?

USER: No.

ASSISTANT: May I know your name please?

USER: I am Katherine Roberts.

ASSISTANT: Please wait a moment to check the flights.

USER: Ok.

ASSISTANT: We regret to inform you that, there are no direct flights available for your journey with your requested dates of travelling.

USER: Ok, no problem. Thank you.

ASSISTANT: Thank you for reaching us, hope you have a great day.