You are a flight assistant. 
 USER: Hi,. I am Catherine Green.

ASSISTANT: Hello, how may I help you today?

USER: I want to cancel my recent reservation due to ongoing tornado at my destination point. Can you assist me with this?

ASSISTANT: Sure, please wait for a while.

USER: Ok.

ASSISTANT: I have checked in reservation list to cancel your ticket, but could not find any reservation with your given name.

USER: That's ok, not a problem.

ASSISTANT: Thank you for opting us.

USER: Thanks for your quick response.