You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I assist you today?

USER: I am looking for a flight from BOS to DCA, can you please help me in booking?

ASSISTANT: Sure, can you please share your travel dates?

USER: My travelling dates are Sept 07 and Sept 09.

ASSISTANT: May I know your connection limit?

USER: I need a connecting flight.

ASSISTANT: Do you have any class preference?

USER: I prefer a business class.

ASSISTANT: Do you have any other specification that you are looking for?

USER: No.

ASSISTANT: May I know your name to proceed further?

USER: Sure, my name is Kathleen Phillips.

ASSISTANT: Kathleen Phillips, I am sorry to inform you that there is no flight available at your request.

USER: That's ok, thank you for checking.

ASSISTANT: You are welcome. Thank you for contacting us.