You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, what can I do for you today?

USER: Donald Parker here. I want to cancel my recent reservation which I have done, due to some health issues. Can you please help me with that?

ASSISTANT: Sure, I am here to help you.

USER: Thank you.

ASSISTANT: Please wait for a minute.

USER: Ok, sure.

ASSISTANT: Thanks for your time, no reservation was found on your name to cancel.

USER: Ok, not a problem. Anyways. thank you.

ASSISTANT: Thank you for choosing us.