You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I help you now?

USER: Joshua Evans here, I want to book a flight from ATL to ORD.

ASSISTANT: Sure, can you please mention the travelling dates of your journey?

USER: Can you help me to book it on 09/22 to 09/24.

ASSISTANT: Ok, please wait for a while.

USER: Ok.

ASSISTANT: Sorry Joshua, there are no flights found on your requested dates.

USER: No issues, thanks for checking.

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

USER: Most welcome.