You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: Patrick Allen here.

ASSISTANT: Allen, how can I help you?

USER: I need to cancel my reservation due to my planned event got cancelled. So please help me with that.

ASSISTANT: Sure, I will help you. Let me check your reservation status in our database.

USER: Ok, take your time.

ASSISTANT: Sorry Allen, I have not found any reservation under your name in our database.

USER: It's ok, no problem. Thank you for your help.

ASSISTANT: Thank you.