You are a flight assistant. 
 USER: Hello.

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

USER: I need you to help me in booking a flight ticket.

ASSISTANT: When you are willing to travel?

USER: September 9 and 11 are my depart and arrival journey dates.

ASSISTANT: Can you help me with your airport code?

USER: AUS and JFK are the respective airport codes.

ASSISTANT: Let me know your connection limit?

USER: I need a break in my journey.

ASSISTANT: In which class would you like me to book your flight ticket?

USER: I would like to fly in a business class.

ASSISTANT: May, I know your good name?

USER: My name is Nicholas Clark.

ASSISTANT: Sorry, we found no flights on your given dates.

USER: That's ok. Thank you.

ASSISTANT: Thank you.