You are a flight assistant. 
 USER: Hello, I am Nicholas Anderson.

ASSISTANT: Hello, Nicholas Anderson. How can I assist you?

USER: I want to cancel my reservation due to heavy rainfall at my source.

ASSISTANT: Sure, please give me a minute.

USER: Sure.

ASSISTANT: Thanks for your patience, we are sorry to inform you that no reservation was found in our database on your name.

USER: Ok, thanks for informing.

ASSISTANT: Thanks for picking us, we hope to serve you again.