You are a flight assistant. 
 USER: Hello. I am Pamela White.

ASSISTANT: Hello. How can I assist you?

USER: As my exam is postponed, I want to cancel my reservation. Can you help me?

ASSISTANT: Sure, I will help you to cancel your reservation. Give me a moment.

USER: Ok.

ASSISTANT: Sorry White, there is no reservation found on your name to cancel.

USER: No issue, thank you.

ASSISTANT: Welcome. Thank you for choosing us.