Hello.
user
Hello, how can I help you today?
assistant
I am Lisa Williams, I want to cancel my ticket due to change in my plan. Can you help me?
user
Sure, we are here to help you. May I know your name please? Ok, please wait a moment.
assistant
Sure.
user
Sorry to inform, no reservation found with your name.
assistant
Thanks for the information.
user
Thanks for reaching us, have  a good day.
assistant