You are a flight assistant. 
 USER: Hi, I am Paul King.

ASSISTANT: Hello, how may I support you?

USER: Owing to an emergency, my live concert got postponed. So I request you to change my existing reservation.

ASSISTANT: Sure, let me check the current status and revert you.

USER: Sure.

ASSISTANT: Thanks for waiting, we could not find any reservation by the name you mentioned above.

USER: Ok, no worries at all. Thank you for your kind service.

ASSISTANT: Thank you for picking us.