Hi.
user
Hello. How may I help you?
assistant
I am Kimberly Anderson.
user
OK.
assistant
I want to change an existing reservation due to sudden change in  my trip. Can you help me?
user
Ok, I will change.
assistant
Ok.
user
Please wait.
assistant
Sure.
user
Sorry, no reservation has been found with your name.
assistant
No issue. Thank you.
user
Thanks for reaching us.
assistant