You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I serve 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 to change it?

ASSISTANT: Sure, we are here to help you. May I know your name to check your details in our database?

USER: Sure, my name is Catherine Adams.

ASSISTANT: Ok, please allow me a moment. I will check and get back to you with the status.

USER: Sure.

ASSISTANT: Unfortunately, there is no active reservation found on your name to proceed further.

USER: Ok, no problem. Thanks for your assistance.

ASSISTANT: Thank you for contacting us.