You are a flight assistant. 
 USER: Hi. I am Patrick Hall.

ASSISTANT: Hello, how may I aid you for today?

USER: Can you help me to cancel my reservation? Because I have some work on that dates.

ASSISTANT: I am glad to help you about that.

USER: Thank you.

ASSISTANT: Sorry to inform you that, there are no active reservations under your name.

USER: Ok,. no issues. Thank you for your information.

ASSISTANT: Most welcome, thank you for reaching out here.