You are a flight assistant. 
 USER: Hello. I am Brian Smith.

ASSISTANT: Hello, how can I help you?

USER: I have a planned a trip to travel America to see the Golden Gate Bridge, but, on an urgent in my office work, I need to cancel the ticket. Will you please help me with that?

ASSISTANT: Sure, just hold on.

USER: Ok, take your time.

ASSISTANT: Sorry to inform you, there is no reservation with your name in our database.

USER: It's ok fine. Thank you for your information.

ASSISTANT: My pleasure.