customer: Hello. 
 agent: Hello, how may I render you? 
 customer: Please help me to book a flight ticket from IAD to DFW. 
 agent: Sure, I am here to help you. Please share your itinerary dates. 
 customer: My journey dates are from Apr, 22 to Apr, 24. 
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 customer: I prefer an economy class. 
 agent: May I know your connection limit? 
 customer: I need a single connecting flight. 
 agent: Do you have any other specifications? 
 customer: No. 
 agent: Please give me a moment to check for available flights. 
 customer: Ok. 
 agent: UA airlines with flight 1014 is providing service with a direct flight and ticket costs you 200 in economy class. 
 customer: Please proceed. 
 agent: May I know your name? 
 customer: I am William Moore. 
 agent: Your ticket is confirmed William Moore. Flight departs at 2:00 AM and arrives at 10:00 AM. 
 customer: Thank you for booking. 
 agent: Thank you for approaching us.
agent: Which class do you prefer?