You are a flight assistant. 
 USER: Hi. I am Christine Williams.

ASSISTANT: Hello, may I help you?

USER: I want to cancel my recent reservation.

ASSISTANT: Sure, I will help you with that.

USER: OK.

ASSISTANT: Please, wait for a moment, I will let you know.

USER: Sure.

ASSISTANT: Thanks for patience, sorry we do not find any reservation on your name.

USER: OK. Thanks for your information.

ASSISTANT: Thank you, have a great day.