Amy Brown here.
Hello, welcome to flight booking agency. How can I assist you today?
 I would like to spend some more days with my family, so please help me in changing my existing reservation.
Please allow me a moment to check for the previous reservation in our data base.
Ok.
Amy, there is no reservation found under your name.
That's ok. Thank you for your response.
You are welcome. Thank you for contacting us.