You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I support you?

USER: I want to change my reservation, due to sudden postpone of my interview. Can you please help me?

ASSISTANT: Sure, I am happy to help you. May I know your good name?

USER: My name is Jerry Phillips.

ASSISTANT: We are sorry to inform you that, there is no active reservation on your name in our data.

USER: Ok, not an issue. Thank you.

ASSISTANT: Thank you for availing us.