customer: Hello. 
 agent: Hello. 
 customer: I am Michelle Thomas. 
 agent: How may I help you? 
 customer: Due to sudden changes, my exams has been postponed. Can you please change my reservation. 
 agent: Sure, please wait for a moment. 
 __ 
 agent: Sorry, there is no reservation matching with your name in our portal to make changes further. 
 customer: Ok, not an issue. Thank you. 
 agent: Most welcome.
customer: Ok.