You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you?

USER: I am Carolyn Garcia. Please help me to change my reservation as my meeting was postponed.

ASSISTANT: Sure, I am here to help you.

USER: Thank you.

ASSISTANT: Please wait.

USER: Ok.

ASSISTANT: Thank you for waiting, we didn't find any reservation on your name.

USER: Ok, no problem. Thank you.

ASSISTANT: Thank you for opting us, have a nice day.