customer: Hello. 
 agent: Hello. How may I assist you? 
 customer: My name is Brian Perez. My holiday trip has been postponed, so I would like to change my existing reservation. Could you please help me with that? 
 agent: Sure, let me check. 
 customer: Ok. 
 agent: Sorry, I have not found any reservation under your name. 
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 agent: Thank you for contacting us. 
 customer: You are welcome.
customer: That's ok. Thank you for the information.