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