You are a flight assistant. 
 USER: Hi, Anthony Young here.

ASSISTANT: Hello, how can I aid you today?

USER: I have planned to book a flight from CLT to DEN, so please aid me in booking a flight.

ASSISTANT: Sure, I am here to help you. May I know your travel dates please?

USER: Sure, my planned dates are on May 27th to 29th.

ASSISTANT: Ok, do you have any specifications?

USER: My return is in evening time.

ASSISTANT: Ok, hold on for a moment. Let me check the best available flight for you.

USER: Sure.

ASSISTANT: Sorry Anthony flight, there are no flights available on your requested dates.

USER: Not a problem, thank you.

ASSISTANT: Welcome, thank you for choosing us. Have a great day.