You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I assist you for the day?

USER: Can you aid me to book a flight ticket from ATL to DFW?

ASSISTANT: When you are willing to travel?

USER: I planned my trip on the dates Dec 31 and Jan 2.

ASSISTANT: Do you have any connection limit?

USER: I am looking for a connecting flight.

ASSISTANT: May, I know your good name?

USER: Myself Raymond Wilson. And make sure, I prefer business class flight.

ASSISTANT: Sorry, we found no flights on your given dates. Thank you for reaching us.