You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How can I aid you?

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

ASSISTANT: Sure, may I know your name please?

USER: I am Gary Lopez.

ASSISTANT: Please give me a moment.

USER: Sure.

ASSISTANT: There is no reservation found with your given name.

USER: Thank you.

ASSISTANT: Thank you for choosing us.