You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I help you?

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

ASSISTANT: Sure, may I know your planned travel dates?

USER: Sure, my planned travel dates are Apr 14 and Apr 16.

ASSISTANT: May I know your connection limit?

USER: Please look for a connecting flight.

ASSISTANT: Do you have any other requirements?

USER: I prefer for a business class.

ASSISTANT: May I know your name please?

USER: Myself Jonathan Baker.

ASSISTANT: Ok, please wait for while.

USER: Sure, I will wait for your response.

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

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

ASSISTANT: Thank you for opting us.