You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I help you?

USER: I want to book a ticket from EWR to JFK, can you help me?

ASSISTANT: Sure, let me know your travelling dates.

USER: My travel dates are June 23 and 25.

ASSISTANT: May I know your connection limit?

USER: I need a connecting flight.

ASSISTANT: Is there any class preference?

USER: I prefer to travel in business class.

ASSISTANT: Do you have any other requirements?

USER: I want to depart in the morning.

ASSISTANT: May I know your name please?

USER: I am David Williams.

ASSISTANT: Sorry, there are no flights found with your given details.

USER: No problem, thanks for checking.

ASSISTANT: Thank you for opting us.