You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How can I assist you?

USER: I want to cancel my reservation.

ASSISTANT: Sure, can I know your name please?

USER: I am Margaret Garcia.

ASSISTANT: Ok, wait a moment please.

USER: Sure.

ASSISTANT: Sorry Garcia, there is no reservation found on your name.

USER: That's ok. Thank you.

ASSISTANT: Thank you for approaching us.