customer: Hello. 
 agent: Hello. How can I abet you? 
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 agent: Sure, I can help you. 
 customer: Ok. 
 agent: Sorry, no reservation found on your name to change your reservation. 
 customer: That's ok, not an issues Thank you for your response. 
 agent: Welcome, have a nice day.
customer: I am David Carter. I need to amend my reservation, can you help me out please?