You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I assist you?

USER: Joshua Thomas here. Can you please reserve a flight ticket from ORD to CLT?

ASSISTANT: Sure, when do you want to travel?

USER: Sure, my travel dates are from Oct 19 to Oct 21.

ASSISTANT: Ok, May I know your class preference?

USER: I want to travel in business class.

ASSISTANT: Ok, please wait.

USER: Sure.

ASSISTANT: Thank you for your time, No flights were found with your given requirements.

USER: Ok, no issues. Thank you for the information.

ASSISTANT: Thank you for choosing us.