You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Patrick Carter.

ASSISTANT: How can I help you today?

USER: Due to sudden work, I want to cancel my reservation. Can you please help me with it?

ASSISTANT: Sure, I'll help you with this. Please wait a moment I'll check the reservation list.

USER: Sure.

ASSISTANT: Thank you for waiting, sorry to inform you that there is no reservation found by this name .

USER: Ok, not an issue. Thank you.

ASSISTANT: Thank you for approaching us.