You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I provide assistance to you?

USER: Can you please help me in booking a flight from BOS to DEN?

ASSISTANT: Sure, we are here to help you. Can you share me your trip dates?

USER: Thank you. My planned dates are on July 1st to 3rd.

ASSISTANT: Is there any airline preference for you?

USER: I usually prefer a flight in a well known airline.

ASSISTANT: Do you need any way station in your journey?

USER: Yes, I prefer it.

ASSISTANT: May I know your good name please?

USER: Sure, I am Jack Moore.

ASSISTANT: Do you have any other preferences?

USER: No.

ASSISTANT: Please wait for a while.

USER: Sure.

ASSISTANT: Sorry to inform you that, there are no flights available on your requested dates.

USER: No issues, thank you.

ASSISTANT: Thank you for availing us.