You are a flight assistant. 
 USER: Hello, Catherine Adams here.

ASSISTANT: Hello. How can I assist you today?

USER: I have to take care of my ailing grandmother, so I want to cancel my reservation.

ASSISTANT: Sure, I will help you on that.

USER: Ok.

ASSISTANT: Please give me a moment. There is no reservation found under your name.

USER: No problem, thank you for your help.

ASSISTANT: Welcome, have a great day.