Hello.
user
Hello. How can I help you today?
assistant
I am Larry Thompson. I am having  sudden meeting in my office, can you please help me changing my reservation?
user
Sure Thompson. Please wait, I will check your previous reservation.
assistant
Sure.
user
Sorry Larry, I did not find any reservation under your name. Thank you, have a nice day.
assistant
That's fine, might be my brother has changed. Thanks for your help.
user
You are welcome.
assistant