You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I abet you?

USER: I am Katherine Jones want to change my reservation, can you help me with it please?

ASSISTANT: Sure, let me check the status an revert you.

USER: Ok.

ASSISTANT: We could not find any reservation by the given name.

USER: That's fine, thank you for the response.

ASSISTANT: Thank you for choosing us.