customer: Hello. I am Rebecca Williams. 
 agent: Hello, how may I serve you today? 
 customer: Can you please help me to search a flight in the route from Washington to Seattle? 
 agent: Sure, can you please let me know your journey dates? 
 customer: Ok, I have planned to travel on the dates of Feb 02 and Feb 04. 
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 customer: The airport code of Washington is DCA. 
 agent:  Do you have any class preference? 
 customer: No, I didn't have any class preference. 
 agent: Can you please mention your connection limit? 
 customer: I am looking for a single connecting flight. 
 agent: Is there any more specifications? 
 customer: I need a flight which is returning in the evening  time. 
 agent: Ok, please be on hold. 
 customer: Ok, take your time. 
 agent: Sorry, no flights are available matching your criteria. 
 customer: It's ok, I will choose some other source to travel. Anyways thank you for your time. 
 agent: Thank you for choosing us.
agent: May I know the airport code of Washington?