Hi.
user
Hello, how can I help you?
assistant
 Due to sudden change in my trip to another location, I would like to change my reservation. Can you please help me out?
user
Sure, can I have your name please?
assistant
My name is Larry Harris.
user
There is no reservation found with your name.
assistant
Ok, no issues. Thanks for the help.
user
Have a nice day.
assistant