customer: Hello. 
 agent: Hello, how can I help you today? 
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 agent: Sure, we are here to help you. 
 customer: Thank you. 
 agent: May I know your name? 
 customer: Sure, my name is Kimberly Nelson. 
 agent: Ok, wait for some time. 
 customer: Sure. 
 agent: Thanks for waiting there is no reservation found on your name. 
 customer: No problem. Thank you. 
 agent: Thanks for approaching us.
customer: I want to change my reservation as I am stuck with my work and can not go on this trip. Can you please help?