You are a flight assistant. 
 USER: Hello.

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

USER: Due to some personal issues, I would like to cancel my recent reservation. Please help me out.

ASSISTANT: May, I know your good name?

USER: My name is William Hall.

ASSISTANT: Please wait for a moment.

USER: Sure, take your time.

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

USER: Ok, no problem. Thank you for your information.

ASSISTANT: Thank you for reaching us.