You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: I am Karen Evans.

ASSISTANT: Is there something I can help you with?

USER: I want to attend a conference with my office clients, please book me a ticket from DEN to MCO. My preferred journey dates are 09/22 and 09/24.

ASSISTANT: Sure. Give me a minute.

USER: Ok.

ASSISTANT: I am sorry to say that there is no flight found.

USER: That's fine, thank you for your information.

ASSISTANT: Thank you for providing me with your details.