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