Hello,.
user
Hello, how may I provide service to you?
assistant
I am Dennis Lewis. Actually I 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 with that?
user
Sure, we are here to help you.
assistant
Thank you.
user
Please wait for a while.
assistant
Sure.
user
Thank you for waiting. we are sorry to inform you that, there is no reservation found with your name.
assistant
Ok, no issues. Thanks for the information.
user
Thank you for approaching us.
assistant