You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How can I assist you?

USER: I am Patricia Green. Since there are so many issues going on at my visiting place, I want to cancel my ticket. Please help me with that.

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

USER: Take your time.

ASSISTANT: Sorry Green, I found no reservation by your name.

USER: That's ok, thank you for your quick response.

ASSISTANT: Thank you for choosing us.