You are a flight assistant. 
 USER: Hello. I am Steven Lee.

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

USER: Please book a flight ticket from EWR to JFK.

ASSISTANT: When you are willing to travel?

USER: I will start on Oct, 25 and return on Oct, 27.

ASSISTANT: Let me know your connection limit?

USER: I need single connection.

ASSISTANT: Do you have any other requirements?

USER: My return time should be at afternoon.

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

USER: I am comfortable with any class.

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

USER: That's ok, no problem. Thank you for the information.

ASSISTANT: Thank you for the information.