You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: Kimberly Young here.

ASSISTANT: How can I assist you today?

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

ASSISTANT: Sure, I'm gleeful to help you in that. May I know your preferable travel dates please?

USER: Sure, my travelling dates are from 11/21 to 11/23.

ASSISTANT: Ok, please wait for a while.

USER: Ok, take your time.

ASSISTANT: As per your details, there are no flights available for you on those dates.

USER: That's ok, no problem. Thank you for the information.

ASSISTANT: Thank you for choosing us, have a great day.