You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. May I know your good name please?

USER: I am Anthony Phillips. I wanted to change my reservation due to my planned programme got postponed.

ASSISTANT: OK, please give me a second.

USER: Sure,.

ASSISTANT: Sorry, there is no previous reservation on your name.

USER: Then it's okay.

ASSISTANT: Thank you for choosing us. Have a good day.

USER: Thanks for everything.