You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you?

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 help me with this?

ASSISTANT: Sure, I will help you. Please specify your name.

USER: Sure, I am Michelle Allen.

ASSISTANT: Sorry to say, there is no reservation on your name in our database.

USER: Ok, Thank you for your help.

ASSISTANT: Thank you for contacting us.