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

ASSISTANT: Hello, how may I serve you today?

USER: I want to cancel my reservation due to sudden change of my plan. Can you help me?

ASSISTANT: Sure, please hold on.

USER: Ok.

ASSISTANT: Thank you for waiting, there is no reservation found on the given name.

USER: Ok, no worries. Thanks for your response.

ASSISTANT: Thank you for approaching us.