customer: Hello. 
 agent: Hello, how may I assist you today? 
 customer: William Wilson here. I want to travel from SFO to DEN for attending a business meeting. Can you please help me for booking the flight ticket? 
 agent: Sure, I will help you. 
 customer: Ok. 
 agent: May I know your dates of journey please? 
 customer: My departure date is 12/19 and return date is 12/21. 
 agent: Ok, please wait for a moment. 
 customer: Ok, I will wait. 
 agent: There is flight with the connections limit 0, are you ok with this ticket booking? 
 customer: Make sure my connections limit is 1. 
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 customer: Thank you for the information. 
 agent: You are welcome.
agent: Sorry, there is no flight found as per your travelling details.