customer: Hello. 
 agent: Hello. How can I aid you today? 
 customer: I need you to book a flight ticket from PHL to LAS. Please help me. 
 agent: Sure, I will help you in booking. 
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 agent: When would you like to travel? 
 customer: August 7 and 9 are my planned travelling dates. 
 agent: Do you want to fly with economy class or business class? 
 customer: I would prefer to fly in a economy class flight. 
 agent: May I know your name please? 
 customer: My name is Carolyn Carter. 
 agent: Please share me your requirements. 
 customer: I would prefer to fly in a direct flight. 
 agent: Unfortunately there is no flight found with your matching information. 
 customer: That's ok. Thanks for your time. 
 agent: Thank you for reaching us.
customer: Thank you.