Hello, this is Charles Baker.
Hello, how can I assist you for the day?
Recently, I made a reservation to Dallas. But due to some high priority works I am unable to fly.
Ok.
Could you change my existing reservation?
Sure.
Thank you.
Please wait for a while, I will check your previous reservation.
Ok.
Thank you for your time, there is no active reservation found on your name.
Ok. No problem. Thank you for your effort.
Thank you for reaching us.