You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I assist you?

USER: I am Helen Perez. I want to cancel my recent reservation due to cancel of my interview.

ASSISTANT: Ok, Please wait a moment, I will check the reservation list and get back to you.

USER: Sure.

ASSISTANT: Helen Perez, there is no reservation on your name.

USER: No problem, thank you.

ASSISTANT: Thank you so much for choosing us.