customer: Hi. I am Mary Allen. 
 agent: Hello, how may I help you at this moment? 
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 agent: Sure, I will help you. Please wait for a while. 
 customer: Sure, take your own time. I will wait for your response. 
 agent: Sorry, there is no reservation existing on your name. 
 customer: That's ok, no problem. Thank you for your information. 
 agent: You are welcome. Thank you for reaching us, have a nice day.
customer: I need to amend my reservation, can you help me out?