Hi, I  am Karen Harris.
Hello. How may I render you today?
Due to the sudden change in climate, my business conference got postponed. So I want you to change my existing reservation.
Sure, please wait a moment I will check the reservation status.
Sure.
Thank you for waiting, I have checked in reservation list to change your ticket, but could not find any reservation with your name.
Ok, no worries at all.
Thank you for availing us.