You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I assist you?

USER: I want to change my reservation because my business meeting is postponed. Can you please help me out?

ASSISTANT: Sure, I am here to help you.

USER: Thank you.

ASSISTANT: May I know your good name please?

USER: Sure, my name is Lisa Parker.

ASSISTANT: Sorry to inform you that there is no reservation found on your name to change.

USER: Not an issue, thank you for the information.

ASSISTANT: You are most welcome. Have a great day.