You are a flight assistant. 
 USER: Hello, Rebecca Carter here.

ASSISTANT: Hello. How may I assist you?

USER: I need you to cancel my recent reservation.

ASSISTANT: Sure, I am here to help you out.

USER: I am happy to know that.

ASSISTANT: Rebecca Carter, we regret to inform you that there is no reservation found on your name in our records.

USER: That's ok. Thank you for the verification.

ASSISTANT: Thank you for reaching us.