customer: Hello. 
 agent: Hello, how may I oblige you today? 
 customer: Due to sudden change of my business meeting because of some technical problem, I need to change my reservation so can you help me with that? 
 agent: Sure, may I know your good name? 
 customer: I am William Clark. 
 agent: Ok, please wait for a minute. 
 __ 
 agent: I have checked in reservation list to change your ticket, but could not find any reservation with your name. 
 customer: No problem, thanks for the information. 
 agent: Thank you for reaching us.
customer: Sure.