customer: Hi, I'm Margaret Taylor. 
 agent: Hello. How may I guide you? 
 customer: I am searching a flight, which travel towards IAD. 
 agent: Ok. 
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 agent: Sure, I would be happy to help you. May I know your preferable dates? 
 customer: My preferable dates are 09/18 and 09/20. 
 agent: I need your source code to proceed the booking, can you provide me? 
 customer: I would like to start my journey from my location, i.e MSP. Please check. 
 agent: Sure, I will check it. 
 customer: Ok. 
 agent: Give me a minute. I am sorry to say that there is no flight with your details. 
 customer: Oh! ok. Thank you for your help. 
 agent: Thank you for reaching us.
customer: Can you help me in booking a flight? Price limit is 500.