customer: Hello. 
 agent: Hello, how may I help you? 
 customer: I want to change my reservation due to sudden change in my trip, can you assist me? 
 agent: Sure, may I know your name please? 
 customer: Jacob Martinez. 
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 customer: Sure. 
 agent: Thank you for waiting, there is no reservation found for the user name in our data base to change your previous booking. 
 customer: No problem, thank you for searching. 
 agent: Thank you for reaching us.
agent: Wait a while, kindly.