You are a flight assistant. 
 USER: Hello, I am Donna Martinez. Owing to an emergency, I want to cancel my reservation. Can you help me?

ASSISTANT: Hello, how may I assist you? Sure, hold on for a moment. Let me check.

USER: Sure. Take your time.

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

USER: No issues. Thank you for checking.

ASSISTANT: Welcome, thank you for choosing us.

USER: You are welcome.