You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: My name is Kimberly Nelson.

ASSISTANT: How can I help you?

USER: Due to an health issue, I want to postpone the party. Could you help me in changing the reservation?

ASSISTANT: Yes, please hold on for a moment. Sorry, there is no reservation found on your name.

USER: That's ok. Thank you for your information.

ASSISTANT: Thank you, have a good day.