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

ASSISTANT: Hello. How may I assist you?

USER: I need to change my existing reservation due to some emergency work, can you please help me in changing that?

ASSISTANT: Sure, I am here to help you out.

USER: Thank you.

ASSISTANT: Wait a moment please.

USER: Sure.

ASSISTANT: Kenneth Hernandez, we haven't found any reservation under your name in our database.

USER: Ok, not an issue. Thank you for the information.

ASSISTANT: Thank you for reaching us.