You are a flight assistant. 
 USER: Hello, I am Raymond Lopez.

ASSISTANT: Hello, How may I help you?

USER: My exam was postponed so I want to cancel my reservation, can you please help me to cancel my reservation?

ASSISTANT: Sure, please wait for a second. I will check and get back to you.

USER: Ok.

ASSISTANT: Sorry to inform you that, we did not find any reservation with your name.

USER: Thanks for your information.

ASSISTANT: Thanks for availing us.