customer: Hello. 
 agent: Hello, how can I assist you? 
 __ 
 agent: Sure, may I know your good name? 
 customer: Myself Christopher Carter. 
 agent: We found a reservation on your good name. 
 customer: Thank you. 
 agent: May I know your preferred dates? 
 customer: I want to fly on Feb 15 and return on Feb 17. 
 agent: Please provide your airport codes to process further. 
 customer: My airport codes are CLT, MSP. 
 agent: Do you need any connections between your trip? 
 customer: I need a single connection. 
 agent: Do you need any other requirements? 
 customer: No. 
 agent: As per your requirements there is a American airlines, flight number:1008 with single connection and price:100. Is that ok for you? 
 customer: Ok, you can proceed to booking. 
 agent: Your ticket has been booked successfully. 
 customer: Thank you. 
 agent: Thank you for opting us.
customer: I want to change an existing reservation, so please help me in changing the reservation.