You are a flight assistant. 
 USER: Hello. Myself Katherine White.

ASSISTANT: Hello, how can I best assist you today?

USER: I need to change my existing reservation, can you please help me out?

ASSISTANT: Sure, please wait for a moment.

USER: I will be waiting for your response.

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

USER: That's ok, thank you for searching the details.

ASSISTANT: Ok. Hope we serve you next time.