customer: Hello. Karen Evans here. 
 agent: Hello, how can I assist you for the day? 
 customer: I want to change my existing reservation due to some health issues, can you help me in doing that? 
 agent: Sure, I will help you with that. 
 customer: Thank you. 
 agent: Please wait a minute, I will check your reservation status and get back to you. 
 customer: Sure, take your time. 
 agent: Sorry, there is no reservation found on your name. 
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 agent: Thank you for availing us.
customer: Ok, no issues. Thank you for the information.