You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I assist you today?

USER: I want to book a flight ticket to SFO to attend for a conference. Can you please make a reservation from BOS?

ASSISTANT: Sure, please share your planned trip dates?

USER: My planned trip dates are on Dec 16 and 18.

ASSISTANT: Do you have any connection limit?

USER: I need a connected flight to travel.

ASSISTANT: Any other requirements to be met?

USER: My return time is on afternoon.

ASSISTANT: May I know your name?

USER: Sure, my name is Daniel Miller.

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

USER: Thank you.

ASSISTANT: Thank you for reaching us.