You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I assist you today?

USER: Benjamin Gonzalez here. I want to cancel my ticket as I am sick.

ASSISTANT: Ok, please wait for a moment.

USER: Sure.

ASSISTANT: Sorry to say that, there was no reservation found with your given name.

USER: No problem, thank you.

ASSISTANT: Thank you for opting us.