You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I aid you?

USER: I want to book a flight ticket to BOS. Can you please help me for booking from DEN?

ASSISTANT: Sure, can you please specify me your dates of travel?

USER: Sure, I have a plan to travel on Dec 11 and 13.

ASSISTANT: Let me know your connection limit?

USER: I prefer to travel in a connected flight.

ASSISTANT: Can I know your name?

USER: Sure, my name is James Clark.

ASSISTANT: Sorry to say, no flight is available for you as per your requests.

USER: Ok, thank you.

ASSISTANT: You are welcome.