customer: Hi. I am Dennis Carter. 
 agent: Hello, how can I help you? 
 customer: I would like to book a flight from SEA to DCA to meet my friend. Can you help me with booking a direct flight? 
 agent: Sure, Can you provide me your travelling dates? 
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 agent: Ok, wait for some time. 
 customer: Ok. 
 agent: Unfortunately there is no flights found on your requested details. 
 customer: Fine, thanks for the information. 
 agent: Thanks for choosing us.
customer: My travelling dates are from 12/05 to 12/07.