Hello.
user
Hello. How can I help you?
assistant
I am Dorothy Hill. I want to do some modifications in my previous reservation, could you please help me?
user
Sure. I will help you to change your reservation.
assistant
Thank you.
user
Sorry, there is no reservation found on your name to change.
assistant
That's ok, thank you for your information.
user
Welcome, have a nice day.
assistant