customer: Hello. 
 agent: Hello, how can I assist you? 
 customer: Alexander Baker here. Can you please help me in booing my flight from SFO to reach PHL? 
 agent: Sure, let me know your travelling dates. 
 customer: Sure, my planned trip dates are Mar 9th and 11th. 
 agent: Please share your connection limit. 
 customer: I need a single stop over in my journey. 
 agent: Do you have any specifications? 
 customer: I want to return in the evening. I prefer business class. 
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 customer: Ok, that is not a problem. 
 agent: Thank you for choosing us. 
 customer: Thank you for the information.
agent: Sorry, there are no flights available based on your details.