You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I assist you?

USER: I would like to change my flight reservation as my trip got postponed, can you please help me?

ASSISTANT: Sure, I am here to help you out. May I know your name please?

USER: I am Susan Evans.

ASSISTANT: Wait a moment please.

USER: Sure.

ASSISTANT: Susan Evans, we haven't found any reservation under your name in our database.

USER: That's ok, thank you for checking.