You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I aid you today?

USER: I planned to attend for a meeting in DCA, can you please help me to book a flight ticket from ATL?

ASSISTANT: Sure, can I know your trip dates?

USER: I prefer to travel on Oct 20 and Oct 22.

ASSISTANT: Do you have any specifications?

USER: I would like to travel in business class.

ASSISTANT:  May I know your name for the documentation process?

USER: I am Gary Parker.

ASSISTANT: There are no flights found on your specified travel dates.

USER: Ok, no problem. Thank you for your information.

ASSISTANT: Thank you for opting us.