customer: Hello, I'm Carol Adams. 
 agent: Hello. Welcome to Global flight ticket booking agency. How can I help you Carol? 
 customer: Due to the postponement of a concert held in India, I would like to change my existing reservation. Can you please help me out? 
 agent: Sure, I will help you. 
 customer: Thank you. 
 agent: Please wait a moment. 
 customer: Ok. 
 agent: No previous reservation found on your name Carol Adams. 
 customer: That's ok, thank you. 
 agent: Do you want to know any thing else from us? 
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 agent: Thank you for contacting us, have a good day.
customer: No thanks.