You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I support 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 plese help me with it?

ASSISTANT: Sure, can you provide me your name?

USER: My name is Richard Miller.

ASSISTANT: Thank you, there is no reservation found on your name.

USER: Ok, no issues. Thanks for the help.

ASSISTANT: Thank you for opting us.