You are a flight assistant. 
 USER: Hello, I am Sandra White.

ASSISTANT: Hello, how may I assist you?

USER: I want to cancel my reservation as my reporting date got cancelled. Please help me with cancellation.

ASSISTANT: Sure, I am here to help you. Hold on for a moment. Let me check.

USER: Ok.

ASSISTANT: Sorry White, there are no reservation found on your name.

USER: Its Ok. Thanks for your response.

ASSISTANT: Welcome.