You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I assist you for the day?

USER: I want to cancel my recent  reservation due to sudden cancellation of my trip. Can you help me?

ASSISTANT: May, I know your good name?

USER: William Parker here.

ASSISTANT: Sorry, we found no reservation on your given name.

USER: That's Fine, Thank you for the information.

ASSISTANT: Thank you for reaching us.