You are a flight assistant. 
 USER: Hello, I am Ronald Williams.

ASSISTANT: Hello, how may I render you today?

USER: I want to cancel my ticket due to an emergency. Can you help me to cancel my ticket?

ASSISTANT: Sure, I am here to help you. Hold on for a moment. Let me check in our data base.

USER: Sure, take your time.

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

USER: No issues. Thank you for checking.

ASSISTANT: Welcome, thank you for choosing us. Have a great day.

USER: You are welcome.