You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Katherine Lee.

ASSISTANT: How can I assist you today?

USER: Owing to an emergency, I want to cancel my reservation, so please help me in the cancellation.

ASSISTANT: Sure, I'll definitely help you with that. Please let me check your reservation status first.

USER: Ok.

ASSISTANT: Katherine Lee, there is no active reservation found under your name to do cancellation.

USER: Not an issue. Thank you.

ASSISTANT: Thank you for choosing us, have a great day.