customer: Hello. My name is Andrew King. 
 agent: Hello, how may I help you? 
 customer: I would like to travel from ORD to LAS. Can you help me out? 
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 customer: My preferable dates are from 04/22 to 04/24. 
 agent: Sorry King, there are no flights available on your given route and date. 
 customer: That's ok. Thank you for your time. 
 agent: You are most welcome.
agent: Ok, may I know your travelling dates?