You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you today?

USER: I need to cancel my reservation due to some personal issues.So can you help me with cancellation of my reservation?

ASSISTANT: May, I know your good name?

USER: I am Thomas Jackson.

ASSISTANT:  Please wait for a moment.

USER: Sure.

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

USER: No problem, thank you for the information.

ASSISTANT: Thank you for choosing us.