customer: Hi. 
 agent: Hello. 
 customer: I want to visit Space center in Houston,can you book a ticket for me? 
 agent: How can I assist you today? Sure, I will help you with flight ticket booking. May I know your good name for proceeding further? 
 customer: Myself Donald Hernandez. 
 agent: Ok, please let me know your travelling dates. 
 customer: My trip dates are 09/23 and 09/25. 
 agent: Can you please provide me basic details like airport codes of your locations? 
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 agent: Ok, please wait a minute, I will inform you flight details. 
 customer: Ok. 
 agent: Thank you for your patience. Sorry to inform you, no airlines is providing a flight in your route. 
 customer: No problem. Thank you for checking. 
 agent: My pleasure. Thank you for choosing us. Have a good day.
customer: I want to fly from ATL to HOU.