You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I guide you?

USER: I want to change my existing reservation as my sister's wedding reception got postponed due to extreme weather condition, can you please help?

ASSISTANT: Sure, please hold on for a moment.

USER: Sure.

ASSISTANT: Can I know your name?

USER: My name is Amy Moore.

ASSISTANT: I am sorry, there are no reservations with your name.

USER: Never mind, thank you for your information.

ASSISTANT: Thank you, have a good day.