You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I abet you today?

USER: I have a reservation to attend a get together party. Due to some issues it has been postponed. Can you please change my existing reservation?

ASSISTANT: Sure, may I know your good name to check the reservation?

USER: William Jackson is my name.

ASSISTANT: Please wait for a moment.

USER: Sure.

ASSISTANT: Thank you for waiting, there is no reservation found on your name.

USER: That's not an issue.

ASSISTANT: Thank you for making us to serve you.

USER: Thanks for your prompt response.