You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I assist you now?

USER: Can you help me in booking my flight ticket from ORD to ATL?

ASSISTANT: Sure, I will help you with that. Can you please provide your preferable dates of travelling?

USER: My trip dates will be May 1st to May 3rd.

ASSISTANT: Do you have any connection limit?

USER: I prefer a connecting flight.

ASSISTANT: Any more specifications do you have?

USER: I prefer a business class.

ASSISTANT: May I know your name to book the flight ticket?

USER: I am Karen Green.

ASSISTANT: Unfortunately there are no flights running on your route with your required preferences.

USER: Its ok, thank you.

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