You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you?

USER: I need to attend my last exam. Can you please book me a flight ticket from Atlanta?

ASSISTANT: Sure, I am here to help you. When do you want to return?

USER: I need to return on 09/28.

ASSISTANT: Ok, May I know your depart date?

USER: Sure, I need to depart on 09/26.

ASSISTANT: Ok, Kindly mention your airport codes.

USER: My airport codes are from ATL to JFK.

ASSISTANT: Ok, May I know your name?

USER: Kevin Wilson is my name.

ASSISTANT: Ok, please give me a minute.

USER: Sure.

ASSISTANT: Thank you for waiting, There were no flights found on your given details.

USER: Ok, no issues. Thanks for your information.

ASSISTANT: Thank you for opting us.