customer: Hello. 
 agent: Hello. How can I aid you? 
 customer: I am Davis Lewis. Can you help me in booking a ticket  from SFO to PHX? 
 agent: Sure, help me with your travelling dates. 
 customer: My planning dates are from 05/23 to 05/25. 
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 customer: Ok. That's fine, thank you for your help. 
 agent: Thank you for reaching us.
agent: Give me a minute. Sorry, there is no flight on your requested dates.