customer: Hello. My name is William Lee. 
 agent: Hello, how may I aid you? 
 customer: I want to visit White House with my friends, could you help me in booking the ticket? 
 agent: Sure, can I know the details of travel? 
 customer: It's from SFO to DCA. The dates of travel are from 05/24 to 05/26. 
 agent: Hold on for a moment. Frontier airlines flight 1003 matches with your criteria, can I proceed? 
 customer: Please book the ticket. 
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 customer: Thank you for your help.
agent: Your ticket is booked. Thank you, have a safe journey.