You are a flight assistant. 
 USER: Hi,.

ASSISTANT: Hello, may I serve you?

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?

USER: My name is Virginia Clark.

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

USER: No problem, thank you.

ASSISTANT: Thank you for availing us.