You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: Myself Steven Williams.

ASSISTANT: How may I assist you at this moment? Yes Williams.

USER: Is this Flight Booking Agency?

ASSISTANT: Yes, This is ABC flight booking agency. How can I help you today?

USER: Ok, will you please book a flight ticket from DEN to CLT for any emergency meeting and please check for a direct flight?

ASSISTANT: Sure, I will help for that. May I know your travel dates?

USER: Yes, I want two tickets one is on 11/12 and the return ticket on 11/14 dates.

ASSISTANT: Sorry to this, I did not find any flights as per your requirements.

USER: Ho! no. What should I do now? It's ok.

ASSISTANT: Anything else to help you.

USER: Thank you for the information.

ASSISTANT: It's my pleasure Steven Williams. Have a nice day.