You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I assist you?

USER: On a sudden change in my trip , I would like to cancel my recent booking can you help me?

ASSISTANT: Sure, may I know your good name please?

USER: My name is Carolyn Anderson.

ASSISTANT: Sorry, there is no reservation found with your name to cancel.

USER: Ok, thank you for your search and your information.

ASSISTANT: welcome.