You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I be of your help?

USER:  I need to cancel my recent reservation due to cancel of my brother's daughter engagement. Can you help me in cancellation?

ASSISTANT: Sure, let me know your good name please.

USER: I made a reservation by this name Larry Davis.

ASSISTANT: Ok, give me a minute.

USER: Ok.

ASSISTANT: There is no reservation found matching your name.

USER: Ok, not an issue. Thanks for your information.

ASSISTANT: Thank you for opting us.