You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I aid you today?

USER: I am planning to visit Atlanta, will you help me in booking the flight ticket from DEN to ATL?

ASSISTANT: Sure, may I know your name please?

USER: Myself Ronald Mitchell.

ASSISTANT: May I know on which dates you are willing to travel?

USER: My travelling dates are Jan 24 and Jan 26.

ASSISTANT: May I know your class preference please?

USER: I prefer to travel in business class.

ASSISTANT: May I know your connection limit please?

USER: I need a flight with single connection.

ASSISTANT: Sorry Mitchell, there is no flight found as per your travelling details.

USER: You can recheck that I would like to depart in evening time.

ASSISTANT: Sorry, I have checked again.No flight found.

USER: Sure, you can proceed with the booking. Thank you for your information.

ASSISTANT: I am unable to book flight as per your requirement.

USER: Ok, not an issue. Thank you.

ASSISTANT: Thank you for reaching us.