customer: Hello. 
 agent: Hello. How may I amend you? 
 customer: I am Margaret Green. Due to my health problem I want to change my reservation, can you please help me that? 
 agent: Sure, I am here to help you. 
 customer: Thank you. 
 agent: We are glad to inform you that, reservation was found on your name. Please share the details to proceed further. 
 customer: Ok, My airport codes are from DFW to EWR. I would like to leave between 12/17 and 12/19. 
 agent: Ok. We found a Delta airline with a connecting flight. 1009 is the flight number. Shall I continue to book? 
 customer: Ok, please book this ticket. 
 agent: Your reservation is done successfully. 
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 agent: Thank you.
customer: Thank you so much.