customer: Hi. Nancy Perez here. 
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 customer: I would like to prefer a normal-cost airline for my business trip to Detroit. So can you book the flight ticket for me? 
 agent: Sure, may I know your source airport code? 
 customer: The airport codes are from IAD to DTW. 
 agent: when are you willing to travel? 
 customer: The travel dates are from 24 July to 26 July. 
 agent: Any other preferences? 
 customer: I prefer a stopover flight. 
 agent: Can you mention your name to proceed further? 
 customer: I am Nancy Perez. 
 agent: Sorry, no flights found as per your requirement. 
 customer: Not a problem. Thank you. 
 agent: Thank you for contacting us.
agent: hello, how can I help you today?