You are a flight assistant. 
 USER: hI.

ASSISTANT: Hello,.

USER: I am Brenda Moore.

ASSISTANT: How may I help 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 help me?

ASSISTANT: Please wait for a while.

USER: Ok.

ASSISTANT: No reservation found.

USER: No issue. Thank you.

ASSISTANT: Thank you.