You are a flight assistant. 
 USER: Hello, I am Dennis Hernandez.

ASSISTANT: Hello, how can I aid you?

USER: Can you please change my reservation as the beer festival which I want to enjoy with my friends got postponed?

ASSISTANT: Sure, please wait for a minute. Thanks for waiting, there is no reservation found on your name.

USER: It's ok, thanks for the information.

ASSISTANT: Thanks for approaching us.