You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I oblige you today?

USER: I made a earlier reservation to attend for a meeting, due to some issues it has been postponed. Can you aid me to change it?

ASSISTANT: Sure, we are here to help you. To proceed further, may I know your name?

USER: Sure, my name is Gregory Jones.

ASSISTANT: Ok, please wait for a moment.

USER: Sure.

ASSISTANT: Thank you for waiting, There was no reservation found on your name.

USER: Ok, not an issue. Thanks for your assistance.

ASSISTANT: Thank you for opting us.