Hi.
user
Hello. How may I aid you?
assistant
I want to cancel my sister's reservation because she have exam next month. Can you please help me?
user
Sure, I am here to aid you. Can you please tell me your sister's name?
assistant
Her name is Sarah Collins.
user
Ok, please wait a minute. I will check and get back to you.
assistant
Sure.
user
Sorry to inform you that, there is no reservation found on your sister's name in our database  to cancel.
assistant
No problem, thank you for checking.
user
You are welcome.
assistant