customer: Hello. 
 agent: Hello, how may I help you? 
 customer: Can you please help me to book a ticket from DTW to MSP? 
 agent: Sure, may I know your name? 
 customer: Larry Smith here. 
 agent: Can I know your travel dates? 
 customer: My travelling dates will be on Dec 5 to Dec 7. 
 agent: Can I know your connection limit? 
 customer: I need a connecting flight. 
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 customer: I want to return in the afternoon in business class. I would prefer normal-cost airline. 
 agent: Ok, wait a minute. 
 customer: Ok. 
 agent: Sorry, we could not find any flight. 
 customer: Ok, not an issue. Thank you. 
 agent: Thank you for reaching us.
agent: Do you have any other requirements?