You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Pamela White.

ASSISTANT: Pamela White. How can I help you?

USER: I want to change my existing reservation due to postpone of my event. Could you please help me?

ASSISTANT: Sure, can you give me a moment.

USER: Sure.

ASSISTANT: Sorry to inform that there no active reservation by the name Pamela White.

USER: No problem, thank you for the information.

ASSISTANT: Thank you for reaching us.