Hello,.
user
Hello, How can I assist you?
assistant
I want to change my existing reservation, so can you help me with that?
user
OK, may I know your good name please?
assistant
Yes, you can call me as Nancy Taylor.
user
OK, Please wait for some time I will check and get back to you.
assistant
OK.
user
Thank you for waiting. There is no reservation found based on your name.
assistant
OK, thank you for your information.
user
Thank you. Have a nice day.
assistant