Hi.
user
Hello.
assistant
I am William Anderson.
user
How may I assist you?
assistant
I want to change my reservation, can you help me?
user
Sure, I am here to help you out. Wait a moment please.
assistant
Sure, I will wait for your response.
user
William Anderson, we haven't found any reservation under your name in our database.
assistant
No problem, thanks for your information.
user
Thank you for choosing us.
assistant