customer: Hello. 
 agent: Hello, how may I assist you today? 
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 agent: Sure, may I know your name to check the details? 
 customer: Patrick Hall. 
 agent: Just a moment, let me check your reservation status in our records. 
 customer: Ok. 
 agent: Sorry, there are no active reservations on your name to change. 
 customer: No problem, thank you for searching. 
 agent: Thank you for reaching our service.
customer: I need to change my reservation due to sudden change in my trip. Can you assist me?