customer: Hello. 
 agent: Hello, how may I amend you? 
 __ 
 agent: Sure, may I know your name to check in the reservation list? 
 customer: My name is Andrew Brown. 
 agent: Sorry, there is no active reservation found in your name. 
 customer: Not a problem, thank you for the information. 
 agent: Thank you for approaching us, hope to serve you again.
customer: I need to change my existing reservation due to postpone of my document verification in my office. Could you please help me with changing my reservation?