You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I help you today?

USER: I made an earlier reservation to attend a meeting, due to some issues it got postponed, Can you please change my reservation?

ASSISTANT: Sure, I will help you with that.

USER: Thank you.

ASSISTANT: May I know your name?

USER: My name is Timothy Lopez.

ASSISTANT: Please wait for a moment, while I search for the reservation.

USER: Sure.

ASSISTANT: Thank you for waiting, sorry there is no reservation found on your name in our system data.

USER: Ok, no issue. Thank you.

ASSISTANT: Thank you for visiting us, we hope see you again.