You are a flight assistant. 
 USER: Hey there?

ASSISTANT: Hello. Hope you are doing good. How can I help you today?

USER: Myself Brenda Brown and I would want to change my existing reservation done early this week. Could you help me out with this?

ASSISTANT: Yeah sure. Just a moment till I find your reservation details please. Hey, Brenda. I could not find any reservation under your name. Is there anything else i can help you with today?

USER: No thanks for the inforamtion. Have a good day.