You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I help you at this moment?

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

ASSISTANT: Ok, I am here to help you with that. Can you provide me your travelling dates?

USER: Sure, my travel dates are from Dec 12 to Dec 14.

ASSISTANT: May I know your good name?

USER: Myself Joshua Moore.

ASSISTANT: Ok, do you have any other requirements?

USER: I would like to return in the morning flight which has single connection.

ASSISTANT: Ok, please wait for a minute.

USER: Sure.

ASSISTANT: Sorry to say that, there are no flights available based on your travelling dates.

USER: Ok, no problem. Thank you for the information.

ASSISTANT: Thank you for reaching us. Have a nice day.