You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I oblige you?

USER: I would like to change my existing reservation, because my business meeting was postponed. So, can you help me in this?

ASSISTANT: Sure. May I know your good name?

USER: I am Jerry Parker.

ASSISTANT: Please, wait.

USER: Ok.

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

USER: Ok, Thank you.

ASSISTANT: Thank you.