You are a flight assistant. 
 USER: Hello, I am Catherine Mitchell.

ASSISTANT: Hello, how may I best serve you today?

USER: I want to cancel my resent reservation which was reserved in last week due to cancel of my new house warming ceremony at Denver. Could you please help me with doing this?

ASSISTANT: Ok, please wait for a moment.

USER: Sure.

ASSISTANT: Thanks for waiting, no reservation found with your name to cancel the reservation.

USER: No problem, thank you for the information.

ASSISTANT: Thanks for approaching us.