You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I assist 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 good name?

USER: My name is Debra Clark.

ASSISTANT: There is no reservation on your name.

USER: No problem, thank you.

ASSISTANT: Thank you.