You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I assist you?

USER: Can you help me to book a flight ticket from JFK to CLT?

ASSISTANT: Sure, let me know your travel dates please?

USER: My travel dates are Sept 13 and Sept 15.

ASSISTANT: Ok, is there any class preference?

USER: I would like to prefer business class.

ASSISTANT: May I know your connection limit?

USER: My connection limit is 1.

ASSISTANT: Do you have any other specifications?

USER: I don't have any other specifications.

ASSISTANT: Can I know your name please?

USER: My name is Justin Allen.

ASSISTANT: Sorry to inform you that there are no flight services available on your given details.

USER: No problem, thank you for the information.

ASSISTANT: Thanks for contacting us.