customer: Hello, I am Nicholas Parker. 
 agent: Hello, how can I assist you? 
 customer: I want to attend a sports meet in Boston, Can you book me a direct flight? 
 agent: Sure, provide me your travelling dates? 
 customer: My trip dates are from 11/29 to 12/01. 
 agent: OK, do you have any limitations? 
 customer: The price limit is 500. 
 agent: Can you provide me your airport codes? 
 customer: My airport codes are TX - DFW and MA - BOS. 
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 customer: Sure. 
 agent: Thanks for waiting, sorry to inform you that there is no flight with your requirements. 
 customer: OK, no issue. Thanks for the help. 
 agent: Thank you, for reaching us.
agent: OK, please wait a minute, let me check and revert you.