customer: Hello. 
 agent: Hello. How can I help you? 
 customer: I need to change my reservation as my get together program got postponed. Can you help me? 
 agent: May I know your name please? 
 customer: I am Samantha Parker. 
 agent: There is a reservation on your name, please share your desired travel dates. 
 customer: I would start on June 30th and return on July 2nd. 
 agent: May I know your preferred airport codes? 
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 agent: Sorry to say, there is no flight on your desired travel dates. 
 customer: That's alright, thanks for your assistance. 
 agent: Thank you for opting us.
customer: My origin is SFO and destination is EWR.