You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I help you?

USER: I want to book a ticket from BOS to EWR to attend seminar, can you help me in booking?

ASSISTANT: Sure, let me know your travelling dates.

USER: I am departing on Nov 02 and return on Nov 04.

ASSISTANT: May I know your connection limit?

USER: I prefer a connecting flight.

ASSISTANT: Do you have any other requirements?

USER: I want a flight with business class.

ASSISTANT: May I know your name please?

USER: My name is Barbara Lee.

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

USER: That's ok, thank you for your information.

ASSISTANT: Thank you for opting us.