You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Raymond Jackson.

ASSISTANT: How can I aid you?

USER: As my plans to visit Oakland got postponed, can you please help me in changing my existing reservation to Oakland?

ASSISTANT: Sure, I am here to help you.

USER: Thank you.

ASSISTANT: Please, wait for a while.

USER: Sure.

ASSISTANT: Sorry, we have not found any reservation on your name.

USER: Ok, not an issue. Thank you for providing information.

ASSISTANT: Thank you for availing us.