Hello.
user
Hello, how can I help you?
assistant
Can you please help me in changing my existing reservation?
user
Sure, can I have your name please?
assistant
My previous reservation has done with the name Deborah Collins.
user
Ok, wait a minute please.
assistant
Sure, I will wait for your information.
user
Thank you for waiting. Sorry, I did not find any reservation by your name in our database.
assistant
Ok, not an issue. Thank you for providing information.
user
Thank you for reaching us, have  a good day.
assistant