You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER:  I already have an reservation to attend a meeting, due to some problems meeting place has been changed. So I need a few changes in my reservation.

ASSISTANT: Ok. To change your reservation, I have to check the list for that I want to know your name.

USER: Sure, my name is Debra Davis.

ASSISTANT: Thanks for your name. Sorry, there was no reservation found on your name. Thank you for opting us, have a nice day.

USER: No problem, thanks for your support.