You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How may I aid you today?

USER: I need to cancel my ticket due to my health issue, can you help me?

ASSISTANT: Sure, I am here to help you. May I know your name please?

USER: I am Nancy Jackson.

ASSISTANT: Ok, wait for a mean while please.

USER: Sure.

ASSISTANT: Sorry to say, that there is no active reservation found as per your name to cancel it.

USER: That's ok. Thank you.

ASSISTANT: You are welcome.