customer: Hello. 
 agent: Hello. 
 customer: Ruth Nelson here. 
 agent: How can I help you at this moment? 
 customer: I want to travel from DCA to DFW for attending a Seminar. Can you please help me for booking the flight ticket? 
 agent: Sure, I will help you with that. May I know your travel dates for booking flight ticket? 
 customer: My travelling dates are from 07/29 to 07/31. 
 agent: Ok, please wait a moment. 
 customer: Ok, I will wait. 
 agent: Sorry for the inconvenience no flights are available in this route as per your requested dates. 
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 agent: Thank you for reaching us.
customer: Anyway, thanks for the information.