Hello, Samuel White here.
user
Hello, Samuel White. How may I help you for the day?
assistant
Due to a change in my joining date, I want to change my existing reservation. Can you please help me out?
user
Sure, We can help you. We are very sorry to inform you that, We did not find any reservation on Samuel White.
assistant
Thank you for the information.
user
Thank you, For making an inquiry with us regarding change reservation.
assistant