Hi.
user
Hello. How may I assist you today?
assistant
I am having sudden meeting in my office, can you please help me changing my reservation?
user
Sure, may I know your name to check the reservation details?
assistant
Ok, my name is Margaret Davis.
user
Sorry, I could not find any reservation with your name in our database.
assistant
Ok, no problem. Thank you for your information.
user
My pleasure.
assistant