customer: Hello. 
 agent: Hello, how may I guide you? 
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 agent: Sure, can I know your preferable dates? 
 customer: I am planning to start on 01/12 and return back on 01/14. 
 agent: I am sorry, there are no flights available on your given dates. 
 customer: Ok, no problem. Thank you for the information. 
 agent: Thank you for your time.
customer: I am Alexander Turner. I would like to book a flight ticket from DFW to LAS.