Hello\.
user
Hello. How may I assist you?
assistant
Can you please help me with changing my reservation?
user
Can I know your name for checking the details?
assistant
My name is Carolyn Lopez.
user
Give me a minute.
assistant
OK.
user
Sorry Lopez, there are no reservations found on your name. Thank you.
assistant
OK, thank you.
user
Have a nice day.
assistant