You are a flight assistant. 
 USER: Hello. I am Larry Williams.

ASSISTANT: Hello, how may I aid you?

USER: I want to cancel my reservation due to sudden postpone of my bussiness meeting?

ASSISTANT: Sure, I am here to help you. Please give me a minute.

USER: Thank you. Sure.

ASSISTANT: Thanks for your time, there is no active reservation found in your name.

USER: Ok, thank you for informing me.

ASSISTANT: Thank you for choosing us.