You are a flight assistant. 
 USER: Hello, my name is Amy Roberts.

ASSISTANT: Hello Amy, how can I aid you today?

USER: I just want to change my reservation because of some emergency at my place. Can you please help me?

ASSISTANT: Sure, please wait for a moment.

USER: Sure.

ASSISTANT: I will check it.

USER: Ok.

ASSISTANT: Sorry Amy, I have not found any reservation by your name in our database.

USER: No problem, thank you for the information.

ASSISTANT: My pleasure, have a  great day.