customer: Hi. 
 agent: Hello, how can I help you? 
 customer: I am Andrew Carter, want to travel from HOU to DFW. Please help me in booking my ticket. 
 agent: Sure, may I know your trip dates? 
 customer: My trip dates are from 06/01 to 06/03. 
 agent: Sorry, there is no flight on your requested travelling dates. 
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 agent: You are welcome.
customer: It's ok, thank you.