You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I assist you?

USER: I would like to cancel my reservation due to some health issues, can you please help me in that?

ASSISTANT: Sure, can I know your name please?

USER: Myself Donna Johnson.

ASSISTANT: Sorry to say that, there is no reservation found on your name.

USER: That's ok, no problem. Thank you for the information.

ASSISTANT: Thank you for approaching us.