customer: Hello. 
 agent: Hello, how can I assist you? 
 customer: I need to change my reservation as my plan to go for trekking got postponed. Can you help me? 
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 customer: I am Ryan Campbell. 
 agent: We regret to inform you that there is no reservation found on your name to change. 
 customer: Ok fine, thanks for your assistance. 
 agent: Thank you for opting us.
agent: Sure, may I know your name to check your reservation from our database?