You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I assist you today?

USER: I planned to meet my cousin in DFW, can you please help me to book a flight ticket from ATL?

ASSISTANT: Sure, may I know your name please?

USER: I  am Donna Wilson.

ASSISTANT: Ok, may I know on which dates you are willing to travel?

USER: I prefer to travel on Apr 1 and Apr 3.

ASSISTANT: Ok, what is your connection limit please?

USER: I need a direct flight.

ASSISTANT: Do you have any other specifications please?

USER: I would like to depart in evening. I prefer to travel in economy class.

ASSISTANT: Ok, please wait for a while.

USER: Sure.

ASSISTANT: Sorry Wilson, there is no flights available as per your travelling details.

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

ASSISTANT: Thank you for reaching us.