You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I serve you today?

USER: I want to change my existing reservation, because my interview got postponed. Will you help me to change it?

ASSISTANT: Sure, may I know your good name?

USER: My good name is Amanda Jackson.

ASSISTANT: Please wait for a while and let me search your reservation.

USER: Sure.

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

USER: Ok, not a problem. Thank you.

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