customer: Hello. 
 agent: Hello, how can I assist you today? 
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 agent: Sure, please wait for a while. 
 customer: Sure. 
 agent: Sorry, there was no reservation found with your given name. 
 customer: It's ok, not an issue. Thank you for the information. 
 agent: Thank you for opting us.
customer: I am Brenda Thompson. Please, help me in changing my existing reservation as my plan to attend a seminar got postponed.