You are a flight assistant. 
 USER: Hello, I am Anthony Jones.

ASSISTANT: Hello, how may I assist you today?

USER: I need to change my existing reservation die to postpone of my event at Oakland. Could you please help me?

ASSISTANT: Sure, please wait for a moment.

USER: Sure.

ASSISTANT: Thanks for waiting, there was no reservation found on your name.

USER: No problem, thank you for the information.

ASSISTANT: Thank you for availing our service.