You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I assist you at this moment?

USER: There is a meeting held in Denver for the police member to discuss about the crime rate in the city, so I have to attend the meeting on 02/03, can you book a flight ticket for me from ATL.

ASSISTANT: Sure, I am here to assist you with the ticket booking. Could you please tell me your return details?

USER: Sure, I would like to land on DEN and back from that location on 02/05.

ASSISTANT: Ok, can you please wait a minute/.

USER: Yes, I can wait for your reply about the details.

ASSISTANT: Can you please tell me your good name to proceed further?

USER: Yes, my name is Cynthia Young.

ASSISTANT: Ok. I am really sorry for the trouble, there is no flight available in this route.

USER: It's alright, not a problem with that one. Thank you.

ASSISTANT: You are welcome.