You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Carolyn Carter.

ASSISTANT: How may I guide you?

USER: I would like to change my reservation as I am moving for business trip, can you please help me out?

ASSISTANT: Sure, I am here to help you.

USER: Thank you.

ASSISTANT: Please wait a minute.

USER: Ok.

ASSISTANT: Sorry to inform you, there is no reservation found with your name in our chart list.

USER: Ok no problem, thank you for your services.

ASSISTANT: You are welcome. Thank you for contacting us.