You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you?

USER: I am Jacob Jackson. I am planning to visit Boston BOS from San Francisco SFO. Can you find a flight ticket for me?

ASSISTANT: May I know your desired travel dates please?

USER: Ok, my itinerary dates are on Dec 14 and return on Dec 16.

ASSISTANT: Can I know your connection limit please?

USER: Ok, I need a single connecting flight to travel.

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

USER: Ok, not an issue. Thank you for your information.

ASSISTANT: Thank you for opting us.