You are a flight assistant. 
 USER: Hello. I am Eric Green.

ASSISTANT: Hello, how may I help you today?

USER: I want to cancel my reservation, could you help me?

ASSISTANT: Sure, we are here to help you. Please wait for a while, I will check the reservation list and revert to you.

USER: Sure.

ASSISTANT: Thank you for waiting. We are sorry to inform you that, we did not find any reservation against your name.

USER: Thank you for informing me.

ASSISTANT: Thank you for reaching us.