customer: Hi. 
 agent: Hello, how can I help you today? 
 customer: Can you please help me in changing my existing reservation? 
 agent: Sure, can I have your name please? 
 customer: I am Lisa Lopez. 
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 customer: Ok. 
 agent: Thanks for waiting, there is no active reservation on your given name. 
 customer: Ok, no problem. Thank you. 
 agent: Thank you for opting us.
agent: Ok, please wait for a while.