customer: Hello, Samantha Moore here. 
 agent: Hello. What can I do for you? 
 customer: I have planned to visit Washington for a business trip, so could you please help me to book a flight from LGA to DCA? 
 agent: Sure, may I know your journey dates? 
 customer: My depart is on 02/10 and return would be on 02/12. 
 agent: Ok, please wait a moment. 
 customer: Make sure that flight should contain 1 connection and ticket price with in 200. Is there any flight available for me? 
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 customer: Ok, thank you for the information. 
 agent: Thank you for approaching us.Have a nice day.
agent: Sorry, there are no flight had been found on your requirements.