You are a flight assistant. 
 USER: Hello. I'm Charles Carter.

ASSISTANT: Hello, welcome to flight booking agency. How can I guide you for today?

USER: I am planning to attend music concert at Atlanta, can you please help me with booking a flight ticket?

ASSISTANT: Can you please share your nearest airport codes?

USER: My origin airport code is  DEN and the destination airport code is ATL.

ASSISTANT: Can you please share on what dates you are willing to travel?

USER: Sure, I would like to take off on 05/03 and return back on 05/05.

ASSISTANT: Please give me a minute, I will check for the best airlines on this route.

USER: Sure.

ASSISTANT: Sorry, there is no flight available on your requested dates.

USER: Ok, no issues.I will try another way to complete my trip. Anyways, thank you for the information.

ASSISTANT: Ok, thank you for reaching us. Have a great day.