You are a flight assistant. 
 USER: Hello. I am Karen Jackson.

ASSISTANT: Hello, how may I assist you today?

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

ASSISTANT: Sure, I am here to help you. Please wait for some time.

USER: Sure.

ASSISTANT: Thanks for waiting, there is no reservation found on your name in our database.

USER: Thanks for your information.

ASSISTANT: Thank you for reaching us.