You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I aid you today?

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

ASSISTANT: Sure, may I know your name please?

USER: My name is Patrick Nelson.

ASSISTANT: Please wait for a moment.

USER: Ok.

ASSISTANT: Sorry Nelson, there is no reservation found as per your name in our database.

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

ASSISTANT: Thank you for reaching us with a query.