You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I help you today?

USER: Due to an emergency, I would like to cancel my recent reservation. Can you help me with this?

ASSISTANT: Sure, I am here to help you.

USER: Thank you.

ASSISTANT: May I know your name please?

USER: My name is Donald Jackson.

ASSISTANT: Ok, wait for a moment please.

USER: Sure, I will wait for your response.

ASSISTANT: Sorry Jackson, there is no reservation found as per your name to cancel it.

USER: Ok, not an issue. May be my brother has cancelled my reservation on behalf of me. Thank you for providing information.

ASSISTANT: You are welcome always.