customer: Hello, myself Elizabeth White. 
 agent: Hello. How can I aid you today? 
 customer: I am planning to book a flight ticket to IAH from AUS, can you please help me out? 
 agent: Sure, I need to know your travelling dates? 
 customer: Sure, my planned travelling dates are May 02 and May 04. 
 agent: How much you can afford for this ticket? 
 customer: I want my ticket fare must be within 500. 
 agent: Sorry to say this, no flights are available on your desired route. 
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 agent: Thank you for reaching us.
customer: It's ok, thank you for the information.