You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I help you?

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

ASSISTANT: I am happy to help you, may I know your name to check your reservation status?

USER: Thank you. I am Virginia Mitchell.

ASSISTANT: Sorry, there is no flight reserved with your name to cancel it.

USER: Ok, not an problem. Thank you for your information.

ASSISTANT: Welcome Virginia Mitchell.