customer: Hi. I am Michael Adams. 
 agent: Hello, how can I aid you today? 
 customer: Can you help me in booking from LAS to DFW? 
 agent: Sure, when will be your trip dates? 
 customer: My travelling dates are from Dec 29 to Dec 31. 
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 customer: Ok, not an issue. Thanks for the information. 
 agent: Thank you for contacting us, hope you visit again.
agent: Thank you for your details, there are no flights found with the given information.