Hello.
user
Hello. How can I assist you for today?
assistant
Can you help me to change my existing reservation?
user
Sure, may I know your name to check the details of your reservation?
assistant
Yes, my name is Andrew Collins.
user
OK Andrew, please wait for a moment.
assistant
OK.
user
Sorry Andrew, there is no reservation found on your name.
assistant
OK, thank you.
user
Thank you for approaching us.
assistant