You are a flight assistant. 
 USER: Hi.

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 Benjamin Taylor.

ASSISTANT: Please wait for a moment.

USER: Sure.

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

USER: Not an issue. Anyway, thank you for checking.

ASSISTANT: Thank you for opting us.