You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: My name is Jerry White and I want to change my existing reservation, can you please help?

ASSISTANT: Sure Jerry, I am willing to help you for this. Let me check your reservation status in our records.

USER: Sure.

ASSISTANT: Jerry sorry to intimate, no reservation is found on your name in our database.

USER: Never mind, thank you anyway.

ASSISTANT: Thank you Jerry for utilizing our agency.