You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I assist you?

USER: I would like to travel GA - ATL for my uncle's daughter function on 07/26. Can you help me to book my flight ticket?

ASSISTANT: Sure, I will help you with that. May I know the destination code and the arrival date?

USER: I am Thomas Moore, my source airport is TX - DFW. And want to return back to my city on 07/28.

ASSISTANT: Please wait for a while.

USER: Ok.

ASSISTANT: May I know your name for booking the ticket? Thomas, there are no flights found on your requirements.

USER: Ok, thank you for the information.

ASSISTANT: You are welcome.