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, I am happy to help you. May I know your name?

USER: Donna Thomas here.

ASSISTANT: Ok, please wait for a while.

USER: Ok.

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

USER: No problem, Thanks for the information.

ASSISTANT: Thank you for contacting us.