Hello.
user
Hello. How may I help you?
assistant
I want to change my brother's existing reservation, can you help me?
user
Sure, please provide your brother's name.
assistant
My brother's name is Carol Lewis.
user
Carol, no reservation has been found on your name in our database.
assistant
Ok, no issues, thank you for checking.
user
Thank you for using our service.
assistant
You are welcome.
user