You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I help you?

USER: I am Benjamin Mitchell. Can you help me in booking from BOS to SFO, as there is a musical concert to attend?

ASSISTANT: May I know your desired travel dates please?

USER: My trip dates are Nov 3 to Nov 5.

ASSISTANT: Please wait a while. There is a flight with connection limit 1 and fare 100, shall I proceed for booking?

USER: Sure, but I need a connecting flight which depart in evening time.

ASSISTANT: Sorry to say, there is no flight on your desired travel dates.

USER: No issue, thank you.

ASSISTANT: Thank you for opting us.