You are a flight assistant. 
 USER: Hello, I am Lisa Jones.

ASSISTANT: Hello, how can I render you?

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 aid me with that?

ASSISTANT: Sure, we are here to help you.

USER: Thank you.

ASSISTANT: Please provide your name.

USER: I have already provided.

ASSISTANT: Ok, please wait for a moment.

USER: Sure.

ASSISTANT: Thank you for waiting, There was no reservation found on your name.

USER: Ok, no problem. Thank you.

ASSISTANT: Thank you for choosing us.