You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I assist you?

USER: I am Robert Martin. Can you please help me in booking a flight ticket from JFK to ORD?

ASSISTANT: May I know your trip dates?

USER: I would like to fly on Mar 13 and return on Mar 15.

ASSISTANT: Do you need any whistle stop in your journey?

USER: Yes, I need a single connection.

ASSISTANT: May I know your depart time and arrival time?

USER: I would like to depart in afternoon time.

ASSISTANT: Do you have any other preferences?

USER: I would like to prefer business class.

ASSISTANT: Sorry to inform you that, there are no flights available with your requirements.

USER: Not an issue. Thank you.

ASSISTANT: Thank you for opting us.