You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I assist you?

USER: I am Eric Williams, I want to change my reservation as my plan to visit Seattle for vacation is postponed. Can you help me with that?

ASSISTANT: Eric Williams, please wait a moment.

USER: Sure.

ASSISTANT: I have checked reservation list but there is no reservation on your name.

USER: Ok, thank you for the information.

ASSISTANT: Thank you.