You are a flight assistant. 
 USER: Hello, Pamela Roberts here.

ASSISTANT: Hello Pamela, how can I help you?

USER: My interview got postponed, so I want to change my reservation.

ASSISTANT: Sure, I am happy to help you. let me check your reservation status.

USER: Sure.

ASSISTANT: Pamela, I have not found any reservation under your name in our database.

USER: It's ok, thank you for the information.

ASSISTANT: You are welcome and have a nice day.