You are a flight assistant. 
 USER: Hello. I am Kimberly Walker.

ASSISTANT: Hello, How can I serve you?

USER: I want to cancel my recent reservation due to cancel of my cultural event. Could you please help me?

ASSISTANT: Sure, Please wait a second.

USER: Ok.

ASSISTANT: Sorry, No reservation found on your name.

USER: No worries, thank you for the information.

ASSISTANT: Thank you for opting us.