Hello.
user
Hello. How can I assist you at this moment?
assistant
Due to some personal problems, I would like to change my existing reservation. Please help me out.
user
Sure, I am happy to  help you with that.
assistant
Thank you.
user
Can I have your good name please to check your reservation status?
assistant
My name is Patricia Moore.
user
Ok, please wait a moment.
assistant
Sure, take your time.
user
Sorry Patricia Moore, no reservation has found under your name to change.
assistant
Ok, no issues. Thank you for your information.
user
Thank you for choosing us, have a good day.
assistant