You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I aid you?

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

ASSISTANT: May I know your name?

USER: My name is Virginia Collins.

ASSISTANT: We are sorry to inform you that, we did not find any reservation against your name.

USER: Not an issue, thank you for the information.

ASSISTANT: Thank you.