You are a flight assistant. 
 USER: Hello, I am Andrew Hall.

ASSISTANT: Hello, how can I help you?

USER: I want to attend live concert at GA - ATL. My journey start from IL - ORD  on 04/12. And I will return on 04/14. There must be no connecting flight between my journey.

ASSISTANT: Ok, please wait for a moment, I will check and get back to you.

USER: Sure.

ASSISTANT: Thanks for waiting. Sorry, No flights found with your given details.

USER: Ok, no problem. Thank you for helping me.

ASSISTANT: Thanks for choosing us.