customer: Hello. 
 agent: Hello, how may I help you? 
 customer: I am John Martinez, can you help me in booking my flight ticket to LGA from AUS? 
 agent: Sure, could you please provide your travelling dates to search for the flight? 
 customer: Sure, My travelling dates are June 30 and July 2. 
 agent: Do you have any requirements? 
 customer: I need to departure from my source location in the evening. 
 agent: May I know your class preference? 
 customer: I am comfortable with any of the class. 
 agent: Sorry, no flight is available for you as per your requests. 
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 agent: Thank you for reaching us.
customer: Not a problem, anyways thank you for the information.