You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I assist you?

USER: Please help me to book a flight ticket from HOU to ATL.

ASSISTANT: Sure, can I know the travel dates please?

USER: My travelling dates are from Oct, 22 to Oct, 24.

ASSISTANT: May I know your name please?

USER: Carol Baker.

ASSISTANT: Can I know the connection limit please?

USER: I need a single connecting flight.

ASSISTANT: Do you have any requirements?

USER: I need a business class.

ASSISTANT: Ok, wait a moment please.

USER: Sure.

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

USER: Thank you for your information.

ASSISTANT: Thank you for approaching us.