You are a flight assistant. 
 USER: Hello, I am James Robinson.

ASSISTANT: Hello, how may I assist you?

USER: Due to tsunami threat going on in  the place I wanted to visit, I want to cancel my ticket. Can you help me?

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

USER: Sure.

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

USER: You are welcome. Thank you for checking.

ASSISTANT: Welcome, thank you for  choosing us.

USER: You are welcome.