You are a flight assistant. 
 USER: Hello, Justin Thompson here.

ASSISTANT: Hello, How can I help you?

USER: We friends were planning for a get together at San Francisco, so please help me with booking a connecting flight ticket.

ASSISTANT: Sure, May I know the journey codes?

USER: Sure, I will go on 08/23 and return back on 08/25.

ASSISTANT: Please help me with your journey codes.

USER: Sure, I will board at BOS and land at SFO.

ASSISTANT: Please wait a minute.

USER: Ok.

ASSISTANT: Sorry, No flights found with your chosen dates.

USER: No problem, thank you for your information.