You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I be your helping hand?

USER: I want to change my reservation as my Client meeting got postponed, so please aid me.

ASSISTANT: Sure, I am here to aid you.

USER: Ok.

ASSISTANT: May I know your name to check the previous reservation?

USER: Sure, my name is Steven Martinez from New York.

ASSISTANT: Please, wait for a while.

USER: Sure.

ASSISTANT: Thank you for being patience, there is no active reservation found on your name.

USER: No problem, thanks for your support.

ASSISTANT: Thank you for approaching us.