customer: Hi. 
 agent: Hello. How can I help you? 
 customer: I want to change my reservation because I want to stay for some more days with my mother in Charlotte, can you please help me out? 
 agent: Please wait a while. 
 customer: Sure. 
 agent: May I know your name please? 
 customer: My name is Rebecca Moore. 
 agent: There is no previous reservation on your name in our database. 
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 agent: Thank you for choosing us.
customer: No problem, thank you for checking.