customer: Hi. 
 agent: Hello. How can I help you? 
 customer: Please book a ticket from ATL to ORD. 
 agent: Your travelling dates please? 
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 agent: May I know your name please? 
 customer: My name is James Smith. 
 agent: I am sorry no flights found on your route. 
 customer: Thanks. 
 agent: Thank you for choosing us.
customer: Travelling dates are Apr 19 to Apr 21.