You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I aid you today?

USER: Myself Michael Carter. Can you please book a flight ticket from BOS to DEN?

ASSISTANT: Sure, I will help you in booking flight ticket.

USER: Thank you.

ASSISTANT: Can you please mention your travel dates for booking flight ticket?

USER: Sure, I need to travel on dates of 10/11 and 10/13.

ASSISTANT: Ok, please hold on a moment.

USER: Sure, take your time. I need connection 0 so please check with that.

ASSISTANT: Sure. Sorry no direct flights available in this route as per your requested dates.

USER: Oh! It is sad to hear. Anyway, thank you for your time.

ASSISTANT: You are welcome.