You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I assist you today?

USER: Can you please help me in changing my existing reservation? As my football match got postponed to some other date.

ASSISTANT: Sure, may I know your good name please?

USER: Thank you for accepting my request. I had reserved it on the name of Kimberly Miller.

ASSISTANT: Please wait a minute.

USER: Sure, take your time.

ASSISTANT: Sorry, there is no active reservation on your name to change.

USER: Oh! I think the ticket was not booked due to server issue. Anyway, thank you for the information.

ASSISTANT: Thank you for opting us.