You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I aid you at this moment?

USER: I am Susan Perez. I want to cancel my reservation, can you help in that?

ASSISTANT: Sure, I am here to help you. Give me a moment to check the existing reservation.

USER: Ok.

ASSISTANT: Sorry Perez, there is no reservation under your name in our listing to cancel.

USER: That's ok, might be my brother has cancelled, anyway thanks for your help.

ASSISTANT: Most welcome. Hope you have a gleeful day.