You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you today?

USER: I am Patrick Hall. Can you please help me to change my reservation as my meeting was postponed?

ASSISTANT: Sure, please wait for a while.

USER: Ok.

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

USER: Ok, no problem. Thank you.

ASSISTANT: Thank you for opting us.