customer: Hello. 
 __ 
 customer: I am David Davis. I would like to change my existing reservation. Could you help me out? 
 agent: Sure, please hold on for a moment, let me check. 
 customer: Sure, please take your time. 
 agent: Can I know your preferable dates? 
 customer: I want to travel from CLT to LGA. Travel dates are from 09/05 and return back on 09/07. 
 agent: I found a flight 1008 of Delta airlines matches with your preferences, can I proceed? 
 customer: Yes, please go ahead. 
 agent: Your ticket is booked. 
 customer: Thank you for the help. 
 agent: Thank you, have a good day.
agent: Hello, how may I aid you?