You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I help you?

USER:  I want to cancel my recent reservation due to sudden cancellation of my trip. Can you help me?

ASSISTANT: Sure, I am happy to help you. May I know your good name?

USER: Donna Lewis here.

ASSISTANT: Sorry, there is no active reservation on your name in our data.

USER: No problem, thanks for the information.

ASSISTANT: Thank you for choosing us.