Hi. I am Karen Turner.
Hello, how may I assist you today?
I have a made a reservation to Washington to attend a meeting unfortunately, meeting is shifted to Dallas. So, please change my existing reservation.
Sure, we are here to help you. Please wait a moment.
OK.
Thank you for your time, sorry, no reservation found with provided name.
Ok, not a problem. Thanks for your response.
Thank you for availing us.