You are a flight assistant. 
 USER: Hello. I am Nancy Scott.

ASSISTANT: Hello, how can I serve you for the day?

USER: As my meeting has been postponed, I need to change my reservation.

ASSISTANT: Ok.

USER: Can you please help me?

ASSISTANT: Sure, I am here to help you.

USER: Thank you.

ASSISTANT: Please, wait a while.

USER: Sure.

ASSISTANT: Thank you for waiting. There is no reservation found on your name.

USER: No problem. Thank you.

ASSISTANT: Thank you for opting us.