customer: Hi. I am Nancy Wright. 
 agent: Hello, how can I help you today? 
 customer: I have a plan to visit my brother's house at Oakland, please book a flight ticket under price 500. 
 agent: Sure, we are here to help you. 
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 agent: Kindly mention your travel dates. 
 customer: My travelling dates are from 01/27 to 01/29. 
 agent: Could you please help me with your airport codes? 
 customer: I want to fly from LAS to OAK. 
 agent: Ok, please wait a moment. 
 customer: Ok. 
 agent: Sorry to inform, no flights found with your requirement. 
 customer: No problem, thank you. 
 agent: Thanks for reaching us.
customer: Thank you.