Hello.
user
Hello, how can I help you at this moment?
assistant
I want to change my existing reservation, can you please help me out?
user
Sure, I am very happy to help you with that.
assistant
Thank you.
user
May I know your name please.
assistant
My name is Samuel White.
user
Sorry, no reservation is found on your name in our database.
assistant
That's ok, thank you for checking.
user
Thank you for reaching us.
assistant