You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I help 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 please change my reservation?

ASSISTANT: Sure, we are here to help you to change it. May I know your name?

USER: Sure, I am Margaret Lopez.

ASSISTANT: Ok, please wait for a while.

USER: Ok.

ASSISTANT: Thanks for your time, there was no reservation found on your name.

USER: Ok, Thank you for providing information.

ASSISTANT: Thank you for availing us.