Hello. I am Keven Phillips.
user
Hello, how may I help you Keven?
assistant
Due to sudden change in the dates of summit which was going to be held in the place, I want to do some changes in my existing reservation, can you please help me?
user
Sure. Give me a minute.
assistant
Sure.
user
There is no reservation with your name.
assistant
Oh! It's ok. Thank you for your quick response.
user
Most welcome.
assistant