customer: hello, I am Michael Green. 
 agent: Hello, how may  I help you today? 
 customer: I want to book a ticket. 
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 customer: I want to travel from Denver, CO - DEN to San Francisco, CA - SFO. 
 agent: May, I know your date of journey? 
 customer: My journey dates is 08/28 to 08/30. My price limit is 5000. I need a single connections. 
 agent: OK,  Please wait a minute. 
 customer: Sure. 
 agent: Thanks a lot for being patience. 
 customer: OK. 
 agent: Your  airline :Frontier, flight number:1003, price :200, connection limit :1. 
 customer: OK. Thanks for the information.
agent: OK, Please tell me your journey details.