customer: Hello. I am Helen Martin. 
 agent: Hello, how can I assist you the day? 
 customer: I need to book a ticket to meet my friend on an event which is organised by parents but I should be volunteer that event. Can you please book me a ticket? 
 agent: Sure, provide your travel dates please? 
 customer: My travel dates are from 11/27 to 11/29. 
 agent: Airport codes please? 
 customer: From OAK to MCO. 
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 customer: Ok, no problem. Thank you.
agent: No flights found on your requested dates. Thanks for reaching us, have a nice day.