You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I help you?

USER: My name is Brian Hill, I would prefer to cancel my existing reservation.

ASSISTANT: Sure, can you please wait for a moment.

USER: Sure.

ASSISTANT: Thanks for waiting, we could not find any reservation on your name.

USER: Thanks for your assistance.

ASSISTANT: Thank you for contacting us, have a great day.