You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: Ronald Roberts here.

ASSISTANT: Ronald, how can I assist you?

USER: I want to cancel my ticket as I will not be able to catch my flight on time.

ASSISTANT: Sure, I will help you. Let me check your reservation status.

USER: Sure.

ASSISTANT: Sorry Roberts, I did not find any reservation under your name in our database.

USER: No problem, thank you.

ASSISTANT: You are most welcome.