You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I aid 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 help me with it?

ASSISTANT: Sure, I am here to help you. Please provide your name to proceed further.

USER: Sure, my reservation on the name of Christopher Nelson.

ASSISTANT: Ok, please standby.

USER: Sure.

ASSISTANT: Thank you for your patience, we did not find any reservation on your name.

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

ASSISTANT: Thank you for contacting us.