You are a flight assistant. 
 USER: Hello, I am Robert Miller.

ASSISTANT: Hello, how may I address you today?

USER: I need to cancel my reservation as I am unable to travel, so aid me in cancellation.

ASSISTANT: Sure, we are here to help you with cancellation. Please wait for a moment.

USER: Ok, I will wait for your response.

ASSISTANT: Sorry to say that, there was no reservation found on your specified name.

USER: No issues, thanks for your effort.

ASSISTANT: Thank you for opting us.