You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How may I help you?

USER: Could you please help me in booking flight ticket from JFK to ATL?

ASSISTANT: Do you have any specific time preference?

USER: I am comfortable to travel at any time.

ASSISTANT: Ok. Is there any connection limit?

USER: Yes, I need a connecting flight.

ASSISTANT: Please provide your journey dates?

USER: My trip dates are June 14 and June 16.

ASSISTANT: Do you have any preferences?

USER: I want a ticket in business class.

ASSISTANT: Can I know your name?

USER: My name is Frank Lopez.

ASSISTANT: Sorry, no flights are available for your requirement.

USER: That's ok, thank you for the response.

ASSISTANT: Thank you. Have a nice day!.