Hello.
user
Hello. How can I assist  you now?
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, can I have your good name please?
assistant
Jennifer White here.
user
Ok, please wait a moment.
assistant
Sure.
user
Sorry to inform you that  no reservation has found under your name to change.
assistant
That's ok, thank you.
user
Thank you for choosing us.
assistant