customer: Hello. 
 agent: Hello, how may I assist you? 
 customer: Please book a flight to San Francisco, SFO. 
 agent: Sure, may I know your origin airport codes? 
 customer: I will take off from Oakland, OAK. 
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 customer: My boss is evening a party on the occasion of his birthday, so will you check flights on 02/03. I have to return on 02/05. 
 agent: May I know your good name please? 
 customer: I am Emily Hall. 
 agent: There is no flight on your details. Thank you. 
 customer: Thank you.
agent: Sure, may I know your travel dates?