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

ASSISTANT: Hello, how can I support you today?

USER: I need to cancel my recent reservation due to health problem. Could you please help me in doing that?

ASSISTANT: Sure, wait for a moment. I will check and get back to you.

USER: Sure.

ASSISTANT: Thanks for waiting, no reservation was found with your name.

USER: No problem, thank you for your information.

ASSISTANT: Thanks for choosing us.