You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I serve you?

USER: Could you amend my reservation?

ASSISTANT: Sure, may I know your name please?

USER: Gregory Robinson here.

ASSISTANT: Please wait for a while.

USER: Sure.

ASSISTANT: We did not find any reservation on your given name.

USER: No problem, thank you.

ASSISTANT: Thank you for approaching us.