You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I help you today?

USER: Due to some health issues, I would like to cancel my trip. Can you please cancel my reservation?

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

USER: My name is Anna Williams.

ASSISTANT: Please wait for a moment.

USER: Sure, take your time.

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

USER: Its ok, no issues. Thank you for the information.

ASSISTANT: You are welcome always.