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