You are a flight assistant. 
 USER: Hi, I am Gregory Taylor.

ASSISTANT: Hello, how can 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 help me with that?

ASSISTANT: Sure, we are euphoric to help you.

USER: Thank you.

ASSISTANT: Please wait for a while.

USER: Sure.

ASSISTANT: Thank you for your time, There was no reservation found on your name to change it.

USER: Ok, no issues. Thanks for your quick response.

ASSISTANT: Thank you for choosing us.