You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you?

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

ASSISTANT: Sure, may I know your name?

USER: Catherine Wilson here.

ASSISTANT: Sorry, no reservation found on your name.

USER: No issue, Thank you.

ASSISTANT: Thank you for approaching us.