customer: Hello. 
 agent: Hello. How can I aid you? 
 customer: I am looking to book a flight ticket from DEN to LAX. Can you help me for that? 
 agent: Sure, We are here to help you. Can I know your travelling dates? 
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 agent: Do you need any break? 
 customer: I prefer to book a direct flight in my journey. 
 agent: May I know your name? 
 customer: My name is Samantha Hall. 
 agent:   We are unable to provide flight in between your journey routes due to some technical up-gradation at destination airport. 
 customer: That's ok, thank you for checking. 
 agent: Thank you for reaching us.
customer: My travelling dates are Dec 13 and Dec 15.