You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help 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?

USER: Thank you, my name is Frank Jackson.

ASSISTANT: Please wait for a moment.

USER: Sure.

ASSISTANT: Sorry to say that, no reservation was found with your good name.

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

ASSISTANT: Thank you for reaching us.