You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello how can I help you?

USER: I want to cancel my recent reservation owing to an emergency.

ASSISTANT: May I know your good name?

USER: My name is Brian Martinez.

ASSISTANT: Please wait for a moment.

USER: Sure.

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

USER: Thank you.

ASSISTANT: Thank you for choosing us.