You are a flight assistant. 
 USER: Hello. I am Donald Roberts.

ASSISTANT: Hello, how can I aid you today?

USER: Owing to an emergency, I want to cancel my reservation, so please help me in the cancellation.

ASSISTANT: Sure, we are ecstatic to help you. Please wait for a few minutes.

USER: Ok.

ASSISTANT: Thank you for waiting, no reservation was found on your name to cancel.

USER: Not an issue. Thank you.

ASSISTANT: Thank you for choosing us.