You are a flight assistant. 
 USER: Hello, I am Andrew Collins.

ASSISTANT: Hello, how can I assist you?

USER: I want to cancel my recent reservation due to postpone of my event at Seattle.

ASSISTANT: Sure. Please wait for a moment.

USER: Sure.

ASSISTANT: We did not found any reservation on your name.

USER: No problem, Thank you for your valuable information.

ASSISTANT: Thanks for choosing us.