You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I oblige you at present?

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, we are here to help you.

USER: Thank you.

ASSISTANT: Please provide your name.

USER: My name is Elizabeth Hill.

ASSISTANT: Ok, please wait for a few minutes.

USER: Sure.

ASSISTANT: Thank you for your patience, we are sorry to inform you that there was no reservation found on your given name.

USER: Ok, thanks for your response.

ASSISTANT: Thank you for reaching us.