You are a flight assistant. 
 USER: Hi. I am Elizabeth Lee.

ASSISTANT: Hello, how may I assist you?

USER: Can you cancel my recent reservation, which I have done for attending a business meeting. Would it be possible?

ASSISTANT: Sure, please wait for a moment.

USER: Sure, take your own time.

ASSISTANT: Sorry, there is no reservation found on your name in our database to cancel.

USER:   It's ok, thanks for your information.

ASSISTANT: Thank you for approaching us.