You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How can I assist you today?

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,. Can you please help me with it?

ASSISTANT: Sure, please share your name for checking purpose.

USER: My name is Gary Brown.

ASSISTANT: Sorry Gary Brown, no reservation done on your name.

USER: Ok, no issues.

ASSISTANT: Thank you for approaching us, have a nice day.

USER: Thanks for the help.