Hello.
user
Hello, how can I help you?
assistant
I want to do some changes in my existing reservation, can you help me for that?
user
Sure, I will help you.
assistant
Thank you.
user
May I know your name please?
assistant
My name is Larry King.
user
Sorry to say, there is no reservation on your name in our database.
assistant
That's ok, thank you for checking.
user
Thank you for opting us.
assistant
Welcome.
user