Hello.
user
Hello. How can I help you?
assistant
I am Gregory Adams. I want to do some modifications in my previous reservation, can 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 your reservation.
assistant
That's ok, thank you for your information.
user
Welcome, have a nice day.
assistant