You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I help you?

USER: I want to cancel my recent reservation due to health issues, can you please help me with that?

ASSISTANT: Sure, I will help you in flight ticket cancellation.

USER: My name is Rachel Clark.

ASSISTANT: Wait for a moment please.

USER: Sure.

ASSISTANT: Thanks for your patience. I regret to inform you that there is no flight reservation on your name to cancel it.

USER: No problem, thank you.

ASSISTANT: Thank you.