customer: Hello. 
 agent: Hello, how can I help you? 
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 agent: May I know your desired travel dates please? 
 customer: I will travel on Dec 13 and 15th. 
 agent: Please wait a while. 
 customer: Please note I am looking for an economy class ticket. 
 agent: May I know your name please? 
 customer: My name is Virginia Moore. 
 agent: Do you have any specifications? 
 customer: I want to depart in the evening. 
 agent: Sorry to say, there is no flight on your desired travel dates. 
 customer: No worries, thank you. 
 agent: Thank you for opting us.
customer: Can you please book a flight from LGA to PHL?