customer: Hello. 
 agent: Hello, how can I help you today? 
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 agent: Sure, may I know your name? 
 customer: Sure, I think reservation is done on name of Stephanie Carter. 
 agent: Ok, please wait a moment. 
 customer: Sure. 
 agent: Sorry to say, no reservation found with your name. 
 customer: No problem, thank you for your information. 
 agent: Thanks for reaching us, have a good day.
customer: I need to change my reservation due to postpone of my exams to some other dates. Could you please change it for me?