customer: Hi. 
 agent: Hello. 
 customer: I am Pamela Martin. 
 agent: How may I assist you? 
 customer: I need to change my existing reservation as my exams got postponed, can you please help me with that? 
 agent: Sure, I will help you. 
 customer: Thank you. 
 agent: Please wait a moment, I will check the reservation list and get back to you. 
 customer: Sure. 
 agent: Sorry Pamela Martin, there is no active reservation on your name. 
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 agent: Thank you.
customer: Ok, no problem. Thanks for your information.