customer: Hi, I am Cynthia Baker. 
 agent: Hello, how may I assist you now? 
 customer: Can you check the availability of flights running in between the points from Charlotte to Washington? 
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 customer: Sure, my airport codes are CLT - IAD. 
 agent: Ok, do you need any specifications in connection? 
 customer: Yes, I need a connecting flight. 
 agent: Kindly, mention your travelling dates? 
 customer: My scheduled dates are on 06/24 to 06/26. 
 agent: Ok, please wait. 
 customer: Sure. 
 agent: We found a flight in Delta airlines with a fare of 100 and the flight number is 1021. 
 customer: Ok, please book it. 
 agent: Sure, your booking is done with a halt in between the journey. 
 customer: Thank you so much. 
 agent: Thank you for choosing us.
agent: Sure, can you please assign your corresponding airport codes?