You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you?

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

ASSISTANT: Sure, please share your name to proceed further with change.

USER: My name is Joseph Moore.

ASSISTANT: Please wait for a while.

USER: Ok.

ASSISTANT: We didn't find any reservation on your name in our system.

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

ASSISTANT: Thank you.