Hello.
user
Hello, how can I help you?
assistant
Can you help me out in changing my existing reservation?
user
Sure, may I know your name please to check whether with your name any ticket had booked or not to change?
assistant
Sure, my name is Paul Brown.
user
Sorry Brown, there is no ticket booked with your name to change.
assistant
Ok, thank you.
user
Thank you for approaching us.
assistant