You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I help you?

USER: I am  Nicole Johnson and I want to change my existing reservation due to my interview got postponed.

ASSISTANT: Sure, let me check the status and revert you.

USER: Ok.

ASSISTANT: Thanks for your time. Unfortunately we did not find any reservations on your name.

USER: Thanks for your information.

ASSISTANT: Thanks you for reaching us.