Hello.
Hello, how may I aid you today from my end?
I want to change my existing reservation, due to some health issue.  Can you help me?
Sure, I am here to help you out. Please provide me your name.
Ok, my name is Sandra Nelson.
Sorry Sandra Nelson, there is no active reservation on your name in our database.
Ok, not an issue. Thank you for your information.
Thank you for reaching us.