customer: Hi. 
 agent: Hello, do you need any help from us? 
 customer: I am Thomas Mitchell. I want to change my reservation as I am sick, can you please help me? 
 agent: I have found reservation, can you please tell me your departure and arrival day? 
 customer: Sure, I want to depart on June 25 and I will return back on June 27. 
 agent: Ok, may I know your location airport codes? 
 customer: Yes, I will travel from LAX to DCA. 
 agent: The economy class with flight number 1000 of JetBlue airline is available having connection as 1, is it ok for you? 
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 agent: Ok, your reservation is confirmed. 
 customer: Thank you very much for your help. 
 agent: You are welcome, have a great day.
customer: Yes, it's ok for me. Please book the ticket.