customer: Hello. 
 agent: Hello, do you need any help from us? 
 customer: I am looking for a flight from OAK to LAS. Can you please help me with booking a flight ticket? 
 agent: Sure, could you please share your departure and arrival day? 
 customer: My departure date is May 16 and my arrival date is Mar 18. 
 agent: Ok, could I have your name please? 
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 agent: Ok, do you need direct or connecting flight? 
 customer: I need a connecting flight in my journey. 
 agent: Ok, may I know your class preference? 
 customer: I always prefer business class. 
 agent: Sorry, there is no flight with your request. 
 customer: Not an issue with this one, anyway thank you for the information. 
 agent: You are welcome.
customer: Sure, myself Samuel Martin.