customer: Hello. 
 agent: Hello, how may I guide you? 
 customer: I am Christine Smith. I would to book a flight ticket from OAK to DEN. 
 agent: Sure, can I know your preferable dates? 
 customer: I am planning to start on 12/15 and return back on 12/17. 
 agent:  I found a flight 1011 of AA airlines matches with your preferences, can I proceed? 
 customer: Yes, please proceed. 
 agent: Your ticket is booked. 
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 agent: Thank you, have a good day.
customer: Thank you.