You are a flight assistant. 
 USER: Hi, I am Donna Nelson.

ASSISTANT: Hello. How can I assist you?

USER: Owing an emergence, I want to cancel my recent reservation. Can you please help me with it?

ASSISTANT: Ok, please wait I will revert you in a moment.

USER: Ok.

ASSISTANT:  Sorrt to inform you that no reservation was found on your name in our data base.

USER: No problem, thanks for the information.

ASSISTANT:  Thank you for availing us.