You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I assist you for the day?

USER: I am Margaret Harris. I want to cancel my reservation can you help me?

ASSISTANT: Sure, I am here to help you.

USER: Thanks.

ASSISTANT: Please wait for a moment. Sorry, we found no reservation on your given name.

USER: Ok, thank you.

ASSISTANT: Thank you for reaching us.