customer: Hello. 
 agent: Hello, How can I help you? 
 customer: Will you help me to book a flight ticket from OAK to IAD? 
 agent: Sure, May I know the travelling dates? 
 customer: I will start on June, 23 and return back on June, 25. 
 agent: Do you have any connection limit? 
 customer: I prefer to single connection. 
 agent: Is there any other requirements? 
 customer: I need to travel in economy class only. 
 agent: May I know your name? 
 customer: My name is Dorothy King. 
 agent: Please wait a minute. 
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 agent: Sorry, No flights found with your chosen dates. 
 customer: That's ok, thank you for the information. 
 agent: Thank you for availing us.
customer: Sure.