You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I assist you?

USER: I need to travel San Francisco, can you please reserve flight ticket from BOS and SFO?

ASSISTANT: May I know your travelling dates?

USER: My travelling dates are Feb,17 and Feb,19.

ASSISTANT: Can I know your connection limit?

USER: I prefer one connecting flight.

ASSISTANT: Please let me know your name?

USER: Myself Kevin Lee.

ASSISTANT: Sorry, no flights available on your route.

USER: Oh! Sad to hear that. Anyway, I will find another alternative to complete my journey.

ASSISTANT: Thank you for reaching us.

USER: Thank you for the information.