You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I assist you?

USER: Please help me out in booking the ticket from SFO to BOS.

ASSISTANT: Sure, may I know your planned travel dates please?

USER: My trip dates will be Dec 19 to Dec 21.

ASSISTANT: Would you like to travel in a connecting flight or a direct flight?

USER: I need a connecting flight.

ASSISTANT: May I know your good name please?

USER: Ronald Allen is my name.

ASSISTANT: Sorry, there is no flight available on your requested dates.

USER: That's ok, thank you.

ASSISTANT: Thank you for reaching us.