Hello.
user
Hello there. Good Morning!!!.
assistant
My friend has changed my plan to visit Dallas to Chicago, so could you please change my existing reservation?
user
How may I help you? sure. I can do that for you. just hold on for a moment. I am sorry but I din't find any reservation between these 2 places. May I assist you with anything else?
assistant
My name is Gary Mitchell.
user
Can I know your name to  enter into our feedback generator. ? sure.
assistant
Thank you for your help.
user
Thanks for your time.
assistant