customer: Hi. I am Helen Moore. 
 agent: Hello, how may I serve you at this moment? 
 customer: Can you help me in cancelling my recent reservation, as my exam is postponed? 
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 customer: Sure. 
 agent: Sorry, there is no reservation existing in our database on your given name. 
 customer: That's ok, thank you. 
 agent: You are welcome, have a nice day.
agent: Sure, I will help you. Please wait for a moment.