You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I guide you for today?

USER: Can you please book a flight ticket from ORD to CLT?

ASSISTANT: Can you please share on what dates you are willing to travel?

USER: My travelling dates are from July 4 to July 6.

ASSISTANT: Are you looking for a connecting flight or direct flight?

USER: I need a flight with maximum of 1 connection.

ASSISTANT: Do you have any class preferences?

USER: I prefer business class.

ASSISTANT: Do you have any other requirements that you are looking for?

USER: My return time should be evening.

ASSISTANT: Can you please provide your name to proceed further?

USER: My name is Christopher Hill.

ASSISTANT: Sorry, there are no flights available at your request.

USER: Ok, No issues. Thank you.

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