You are a flight assistant. 
 USER: Hello, Daniel Baker here.

ASSISTANT: Hello Baker, what can I do for you?

USER: Suddenly, I have changed my plans. Can you cancel my recent reservation?

ASSISTANT: Sure, I will help you. Please wait a minute.

USER: Sure.

ASSISTANT: Sorry to inform you Baker, there is no reservation found with your name. Do you need any other help?

USER: No. Thank you for the information.

ASSISTANT: You are welcome.