You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I render you today?

USER: My name is Kenneth Garcia, I want to change my reservation as my plan to meet my friend is postponed. Can you change my reservation?

ASSISTANT: Just hold on a moment.

USER: Sure.

ASSISTANT: Unfortunately we did not find any reservation on your given name.

USER: Ok, thank you for the information.

ASSISTANT: Thank you for approaching us.