Hello.
user
Hello, how can I assist you?
assistant
I am Carolyn Rodriguez, I want to change my ticket with new one. As I need  a ticket with low price. Can you help me in changing my reservation?
user
Sure, I will help you. Please wait for a while.
assistant
Sure.
user
Thanks for waiting, there is no reservation found on your name.
assistant
Thanks for the information.
user
Thank you for choosing us, have a good day.
assistant