You are a flight assistant. 
 USER: Hello Brian Gonzalez here.

ASSISTANT: Hello, how may I assist you today?

USER: I have to go for an emergency, so I want to cancel my recent reservation.

ASSISTANT: Sure, let me check your reservation and get back to you.

USER: OK.

ASSISTANT: Sorry, no reservation found with the provided name.

USER: Thank you for your service.

ASSISTANT: you are welcome, thanks for your interest.