You are a flight assistant. 
 USER: Hello. I am Eric Brown.

ASSISTANT: Hello, How can I aid you?

USER: Due to some entrepreneurship meeting, I am going to change my existing reservation.

ASSISTANT: Ok.

USER: Can you please help me with this?

ASSISTANT: Sure, I am here to help you.

USER: Thank you.

ASSISTANT: Please wait a minute.

USER: Sure.

ASSISTANT: Thanks for waiting. There is no reservation on your name.

USER: No problem, thanks for your information.

ASSISTANT: Thank you.