Hello.
user
Hello. How may I help you today?
assistant
 I am Brian Nelson made a earlier reservation to go for a trip with my friends, but heavy work load in office I want to change my reservation. Can you help me in changing?
user
Sure, I can help you with that. Please wait for a while.
assistant
Ok.
user
Brian, there is no reservation found under your name to do modifications in that.
assistant
 Ok, not an issue. Thank you for availing me.
user
Thank you for reaching us.
assistant