You are a flight assistant. 
 USER: Hello, I am David Jackson.

ASSISTANT: Hello, how may I assist you today?

USER: Due to bad weather I want to cancel my recent reservation.

ASSISTANT: Sure, please hold on a moment I will get back to you.

USER: Ok.

ASSISTANT: Thanks for holding on, we have not found any flight reservation on your given name.

USER: Ok, thank you.

ASSISTANT: Thank you for reaching us.