You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I assist you?

USER: Can you help me to book a flight ticket from LAX to BOS?

ASSISTANT: Sure, I will help you. Can I have your planned travel dates?

USER: My travel dates are Feb 15 and Feb 17.

ASSISTANT: May I know your name please?

USER: I am Stephanie Wilson.

ASSISTANT: Do you have any connection preference?

USER: Yes, I prefer connecting flight for this trip.

ASSISTANT: Do you have any other specifications?

USER: I would like to prefer business class flight ticket.

ASSISTANT: Stephanie Wilson, no flights has been found on your planned travel dates.

USER: No problem, thank you for the information.

ASSISTANT: Thank you for choosing us.