customer: Hi. 
 agent: Hello, how may I address you? 
 customer: I am Katherine Edwards. I need to book a flight ticket from DFW to AUS, Can you please help me for booking? 
 agent: Sure, on what dates are you willing to travel? 
 customer: I would like to travel on 08/19 08/21. 
 agent: Is there any class preference? 
 customer: I am comfortable with any class. 
 agent: How much fare are you expecting? 
 customer: I can pay up to 500. 
 agent: Ok, please wait. 
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 agent: Thank you for waiting, I regret to inform you that there are no flights obtained on your journey dates to book a flight ticket. 
 customer: Ok, no problem. Thanks for your information. 
 agent: Thank you for picking us.
customer: Sure.