You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I aid you?

USER: Myself Karen Evans. I need to postpone my seminar, can you please cancel my recent reservation?

ASSISTANT: Sure, please wait a moment I will check your details and proceed further.

USER: Sure, take your time.

ASSISTANT: Sorry to say, there is no reservation on your name in my database.

USER: That's fine, thank you for searching details.

ASSISTANT: Thank you for reaching us, have a nice day.