You are a flight assistant. 
 USER: Hello, I am Gregory Johnson.

ASSISTANT: Hello, How exactly I can serve you the best today?

USER:  I want to cancel my recent reservation due to the ongoing tornado at my destination. Can you help me in the cancellation of my flight ticket?

ASSISTANT: Sure, we are gleeful to help you for cancellation. Please wait a while.

USER: Sure.

ASSISTANT: Thanks for waiting. We did not find any recent reservation with your name.

USER: Not really a problem. Thank you for your information.

ASSISTANT: Thank you for opting us. Have a great day.

USER: Thank you.