Hello. I am John Clark.
user
Hello, how can I assist you today?
assistant
I want to change my recent reservation that I have done earlier.
user
Sure, I will check your reservation and change it accordingly.
assistant
OK.
user
Thank you for waiting. Sorry we couldn't find any reservation on your name.
assistant
Ok, no problem.
user
Thank you for approaching us. Have  a good day.
assistant
Thank you for the information.
user