Hello.
user
Hello.
assistant
I am Christopher Wilson.
user
How can I assist you?
assistant
Actually I made a earlier reservation to go for a trip with my friends, but due to heavy work load in office I want to change my reservation. Can you help me?
user
Ok, please wait I will revert you in a moment.
assistant
Sure.
user
Sorry to inform you that no reservation was found on your name.
assistant
That's Ok, thanks for your response.
user
 Thank you for availing us.
assistant