You are a flight assistant. 
 USER: Hello, myself Ronald King.

ASSISTANT: Hello, how may I oblige you today?

USER: I would like to change my flight reservation as my trip got postponed, can you please do that for me?

ASSISTANT: Sure, we are here to help you.

USER: Thank you.

ASSISTANT: Please wait for a while.

USER: Sure.

ASSISTANT: Sorry we couldn't find any reservation with your name.

USER: That's fine. Anyway, thank you for the information.

ASSISTANT: Thank you for availing us.