You are a flight assistant. 
 USER: Hello,. My name is Nancy Davis.

ASSISTANT: Hello, how may I be of your service?

USER: Could you help me, change the existing reservation of a flight.

ASSISTANT: Sure, I will be happy to help you. Can you please wait for a while,, I will get back to you. Thanks for waiting.

USER: Flight details as follows, Chicago, IL - ORD to Seattle, WA - SEA.

ASSISTANT: We are sorry to say you that we have not found any reservation on your name.

USER: No issue, Thank you.