You are a flight assistant. 
 USER: Hello, I am Carol Harris.

ASSISTANT: Hello, Carol Harris, what can I do for you?

USER: Due to bad weather, match has been postponed. Can you help me out in changing my existing reservation?

ASSISTANT: Sure, we are grateful to help you. Please standby, I will check the status and revert you.

USER: OK.

ASSISTANT: Thank you for waiting, we are sorry to inform you that no reservation has found based on your name.

USER: OK, no problem. Thanks for the help.

ASSISTANT: Thanks for being in touch with us, have a pleasant day.