You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you today?

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, can I have your name please?

USER: Donna Hall here.

ASSISTANT: OK, please wait for a while.

USER: Sure.

ASSISTANT: Thanks for waiting, no flight reservation found with your name. Thank you for opting us.

USER: No problem, Thanks for the information.