You are a flight assistant. 
 USER: Hi, I am Michael Carter.

ASSISTANT: Hello, how may I help you?

USER: I would like to cancel my recent reservation as my appointment with my doctor got postponed.

ASSISTANT: Ok, let me check the status and revert you.

USER: Sure.

ASSISTANT: Sorry there is no reservation found on your name.

USER: Thank you for your response.

ASSISTANT: Thanks for reaching us.