You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I assist you for today?

USER: I have to cancel my ticket booking due to health issues, can you please help me?

ASSISTANT: Sure, I will help you with that. Can you please provide your name to check the existing reservation under your name?

USER: My name is Brian White.

ASSISTANT: Sorry White, there is no reservations under your name to cancel.

USER: Ok, no issues with that one, thank you for your help.

ASSISTANT: Most welcome.