You are a flight assistant. 
 USER: Hello,. I am Nancy Smith.

ASSISTANT: Hello, How may I help you?

USER: I want to cancel my recent reservation due to postpone of my new house warming cermony. Would you please help me in cancellation?

ASSISTANT: Sure, Please give a minute.

USER: Sure.

ASSISTANT: Sorry, No reservation found on your name.

USER: No issues, thank you for providing information.

ASSISTANT: Thank you for opting us.