You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: I am Raymond King. I want to change my flight reservation as my trip got postponed, please help me out.

ASSISTANT: Sure, I am here to help you. Hold on for a moment. Let me check.

USER: Sure.

ASSISTANT: Sorry Raymond King, there are no flights reserved on your given name formerly.

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

ASSISTANT: Welcome, thank you for choosing us. Have a great day.