You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I assist 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 change your flight ticket. Please share me your name to check the reservation list?

USER: Sure, I am Debra Lewis.

ASSISTANT: Please wait a moment.

USER: Ok.

ASSISTANT: Sorry there is no reservation on your name.

USER: Ok, Thanks for your help.

ASSISTANT: Thank you.