customer: Hello. 
 agent: Hello. How can I help you? 
 customer: I am planning to celebrate my birthday in Denver, so please book a flight ticket from OAK to DEN. 
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 customer: I want to fly on Dec 24, return on Dec 26. 
 agent: Ok, may I know your name? 
 customer: My name is Michael Evans. 
 agent: Ok, please be on hold for a while. 
 customer: Sure, I want a flight with one connection. 
 agent: There is a flight-1006 available as per your requirements in Delta airlines and the ticket fare is 200 only. Can I book the ticket for you? 
 customer: Ok, proceed to booking. 
 agent: Your ticket is booked in economy class. Have a nice day. 
 customer: Thank you. 
 agent: You are most welcome.
agent: Sure, I am here to help you. May I know your travel dates?