customer: Hello, I am George Roberts. 
 agent: Hello, how may I serve you today? 
 customer: I want to travel from AUS to DFW for a meeting, Can you please book a ticket for me? 
 agent: Sure, may I know your travelling days? 
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 agent: Please wait for a moment, I will check the availability of flights and inform you. 
 customer: Sure. 
 agent: Thank you for waiting. Sorry to inform you that unfortunately there are no flights available on the specified days. 
 customer: Thank You. 
 agent: Thank you for contacting us.
customer: My depart is on 05/27 and return is on 05/29.