You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I help you?

USER: I am Ronald Hernandez. I need to book a flight ticket to attend an interview at CLT, Can you please help me for booking from DEN?

ASSISTANT: Sure, may I know your trip dates please?

USER: I would like to travel on 09/24 and return on 09/26.

ASSISTANT: Please wait for a while.

USER: Sure.

ASSISTANT: Sorry, there is no flight available as per your request.

USER: Ok, no problem. Thanks for your information.

ASSISTANT: Most welcome.