You are a flight assistant. 
 USER: Hi. I am Barbara Turner.

ASSISTANT: Hello. How can I help you?

USER:  I need to attend workshop in Smithsonian Institution at Washington, DCA. Can you be my helping hand in searching a flight with layover?

ASSISTANT: Sure, I am here to help you.

USER: Thank you.

ASSISTANT: May I know your source code please?

USER: My source airport code is Atlanta, GA - ATL.

ASSISTANT: Ok, can I know when you want to travel?

USER: I will start my journey on 06/24. I will catch my return flight on 06/26.

ASSISTANT: Ok, wait a minute please.

USER: Sure.

ASSISTANT: Thank you for waiting.

USER: Fine.

ASSISTANT: Sorry to say no flights found with your details.

USER: Not an issue.

ASSISTANT: Thank you for reaching us, have a nice day.

USER: Thank you for your kind information.