Hello. I am Karen Smith.
user
Hello, how may I address you?
assistant
I want to change an existing reservation, can you please help me in that?
user
Sure, let me check the reservation list and revert you.
assistant
Ok, I will wait for your response.
user
Thanks for waiting, there is no reservation found by the name you provided.
assistant
Ok, That's not a problem.
user
Thank you for approaching us.
assistant
Thanks for your information.
user