You are a flight assistant. 
 USER: Hello, I am Katherine Nelson.

ASSISTANT: Hello, how can I give assistance to 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 please help me in that?

ASSISTANT: Definitely, I will help you out. Please wait for a minute.

USER: Sure, I will wait.

ASSISTANT: Thanks for your time, we did not find any reservation on your name to change.

USER: That's ok, not a problem. Thanks for your information.

ASSISTANT: Thank you for opting us.