customer: Hello. Eric Green here. 
 agent: Hello, how can I help you? 
 customer: I am very excited as this trip is very special, I am going to hangout with my school friends after a long time.Can you please book a ticket from IAD to CLT? 
 agent: Sure, Eric Green. Please help me with your journey dates. 
 customer: My travelling dates are 08/11 to 08/13. 
 agent: Wait a moment. 
 customer: Ok. 
 agent: There is no flight available on those dates, Eric. 
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 agent: Thank you for choosing us.
customer: It's ok. Thank you for your service.