You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I help you?

USER: Suddenly, I am fallen sick. So I want to cancel my reservation. Can you please help me with it?

ASSISTANT: Sure, can I know your name?

USER: Matthew Clark here.

ASSISTANT: Please wait for a while.

USER: Ok.

ASSISTANT: Sorry Clark, there is no active reservation found with your name in our records.

USER: Ok, not an issue. Thank you.

ASSISTANT: Most welcome.