You are a flight assistant. 
 USER: Hello, I am Shirley Clark.

ASSISTANT: Hello, how can I serve you?

USER: I need to cancel my recent reservation due to cancel of my brother's daughter engagement got cancelled.

ASSISTANT: Sure, give me sometime to check and revert to you.

USER: Ok.

ASSISTANT: Thank you for your time. Unfortunately there is no reservation found according to your name.

USER: Ok, no problem. Thanks for your information.

ASSISTANT: Thank you for picking us.