You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I best serve you today?

USER: I want to cancel my reservation due to my health issue, so can you please help me with cancellation?

ASSISTANT: Sure, may I know your name please?

USER: My name is Virginia Turner.

ASSISTANT: Ok, please wait for a moment.

USER: Ok.

ASSISTANT: Thanks for waiting, no reservation found with your name to cancel.

USER: No problem, thank you.

ASSISTANT: Thanks for opting us.