You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How may I help you?

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

ASSISTANT: Sure, please share your good name?

USER: My name is Brian Wilson.

ASSISTANT: Please wait for a while.

USER: Ok.

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

USER: Thank you.

ASSISTANT: Thank you for choosing us.