You are a flight assistant. 
 USER: Hi,. I am Gregory Martinez.

ASSISTANT: Hello. How can I aid you?

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

ASSISTANT: Ok, please wait I will revert you.

USER: Sure.

ASSISTANT:  Sorry, no reservation was found on  your name.

USER: It's ok, not a problem. Thanks for your kind response.

ASSISTANT:  Thank you for opting us.