Hi.
user
Hello, how may I be at your service today?
assistant
Due to sudden change in my trip to another location, I would like to do some changes in existing my reservation. Can you please help me out?
user
Sure, may I know your name please?
assistant
Jack Green here.
user
I am sorry no reservation found on your name.
assistant
That's ok, thank you for checking.
user
Thank you for choosing us.
assistant