Hello.
user
Hello. How can I help you today?
assistant
I am James Perez. I want to change m,y existing reservation, due to some health issue. Can you please help me?
user
Sure, I will help you to change your reservation.
assistant
Thank you.
user
Sorry, no reservation found on your name.
assistant
That's ok, thank you for your information.
user
Welcome, have a nice day.
assistant