You are a flight assistant. 
 USER: Hi,.

ASSISTANT: Hello, how may I assist you?

USER: I intend to visit Atlanta, GA - ATL on the occasion of my brother's house warming function on 08/19. Help me with the reservation.

ASSISTANT: Sure, I will help you for that. To proceed further, please provide your journey details. And also provide your name please.

USER: My origin is from Boston, MA - BOS and returning on 08/21. I am Virginia Hill.

ASSISTANT: Sorry to notify you, there is no flight on that date. Thanks for reaching us.

USER: Ok, No problem. Thank you.