You are a flight assistant. 
 USER: Hello. I am William Robinson.

ASSISTANT: Hello, how may I aid you today?

USER:  I made a reservation earlier this week to give a seminar, but my seminar has been cancelled. Can you help me with cancellation?

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

USER: Sure.

ASSISTANT: Sorry, there was no reservation found with your name.

USER: That's Ok, thanks for your assistance.

ASSISTANT: Thank you for opting us.