customer: Hello. 
 agent: Hello, how may I help you? 
 customer: I am Stephen Allen, want to travel from HOU to PHX. 
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 customer: My travelling dates are fro 09/19 to 09/21. Please make sure, I want a direct connection. 
 agent: There is no flight available. 
 customer: It's ok, thank you. 
 agent: Welcome.
agent: On which dates you are willing to travel?