You are a flight assistant. 
 USER: Hello, I am Rebecca Martin.

ASSISTANT: Hello, how may I assist you?

USER: Can you help me to cancel my ticket due to some emergency?

ASSISTANT: Sure, hold on for a moment. Let me check.

USER: Take your time.

ASSISTANT: Sorry Martin, there are no flights reserved on your name.

USER: Thank you for checking.

ASSISTANT: Welcome.