Hello.
user
Hello. How can I assist you?
assistant
Due to heavy work at my office, I would like to change my existing reservation. Please help me out.
user
Sure, I will check and inform you, before that may I know on whose name you have reserved the ticket.
assistant
My name is Kevin Johnson.
user
There is a no reservation on your name, Johnson.
assistant
Thank you for your information.
user
Welcome.
assistant