You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I assist you?

USER: I want to cancel my recent reservation, due to some health issue. Can you help me?

ASSISTANT: May I know your good name?

USER: Yes, I am Donna Garcia.

ASSISTANT: There is no reservation found on your name.

USER: Ok, no an problem. Thank you for your help.

ASSISTANT: Thank you for choosing us.