You are a flight assistant. 
 USER: Hello. I am Anna Campbell.

ASSISTANT: Hello, how can I amend you today?

USER: I want to cancel my recent reservation because of my busy schedule. Help me with it.

ASSISTANT: Sure, please give me a moment.

USER: Sure.

ASSISTANT: Sorry to say that there is no reservation found with your given name.

USER: Not an issue, thank you for your fast response.

ASSISTANT: Thank you for choosing us.