You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I serve you today?

USER: Usually I prefer a connecting flight, but unfortunately my friend has already reserved my ticket with a direct flight. So, I want to change it. Can you help me to change it?

ASSISTANT: Sure, I will help to change your reservation.

USER: Thank you.

ASSISTANT: May I know your good name?

USER: Sure, my name is Anna Phillips.

ASSISTANT: Please wait for a moment, while I search for your reservation.

USER: Sure.

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

USER: That's Ok, thanks for your assistance.

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