customer: Hello. 
 agent: Hello. How may I assist you? 
 customer: I am Dorothy Clark. I am planning to book a ticket to attend a meeting at JFK. Can you please help me out? 
 agent: Yes, can you tell me your travelling dates? 
 customer: These are my travelling dates 10/21 and return back on 10/23. 
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 customer: My source code is ORD. 
 agent: Give me a moment. 
 customer: Sure. 
 agent: Sorry to inform you that there are no flights found on your requested dates. 
 customer: That's fine. 
 agent: Thank you for consulting us. 
 customer: Thank you for your service.
agent: Ok, could you share me your source airport code?