You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I help you at this moment?

USER: I want to cancel my reservation, can you please assist me?

ASSISTANT: Ok, I am happy to help you with that.

USER: Thank you.

ASSISTANT: May I know your name?

USER: My name is Debra Brown.

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

USER: Ok, thank you for informing me.

ASSISTANT: Thank you for reaching us.