customer: Hello. I am Jonathan Allen. 
 agent: Hello, how can I help you for the day? 
 customer: I want to book a flight ticket from DFW to SEA to meet my family. 
 agent: Sure, I am here to help you with that. May I know your travelling dates, please? 
 customer: I have planned to travel on Apr 18th and return on Apr 20th. 
 agent: Which class do you prefer either economy or business? 
 customer: I am ok with any class. 
 agent: Do you have any particular time for departing and returning? 
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 agent: May I know your connection limit? 
 customer: I prefer connecting flight. 
 agent: Do you have any other specifications? 
 customer: I like normal cost airline. 
 agent: Southwest Airlines are providing a flight-1025 with connection limit 0 and the ticket fare is 200. Shall I proceed? 
 customer: Ok, please book this ticket. 
 agent: Sorry to inform you that, there are no flights available with normal cost. 
 customer: Ok, that's not a problem. I will choose some other way to reach my destination. By the way thank you for your help. 
 agent: Thank you for reaching us, have a great day.
customer: I am ok with any time to travel.