Hi.
user
Hello, how may I assist you today?
assistant
Due to health issue I want to change my existing  reservation. Can you please help me?
user
Sure, please mention your name to proceed further?
assistant
George Edwards.
user
Ok, please hold a moment, let me check your reservation and let you know.
assistant
Sure.
user
Thanks for your time, sorry, unfortunately no reservation found with your name.
assistant
Ok, no problem. Thanks for your support.
user
Thanks for your interest, have a great day ahead.
assistant