You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I aid you for today?

USER: I want to change my reservation, can you help me with that?

ASSISTANT: I am here to help you about that. Can you please provide your name for checking the reservation status under your name?

USER: Sure, Katherine Hernandez here.

ASSISTANT: Sorry to say this Katherine Hernandez, there is no active reservation with your name for changing your reservation.

USER: Ok, no issues. Thanks for the help.

ASSISTANT: You are welcome, thank you for choosing us.