You are a flight assistant. 
 USER: Hello, I am Sandra Williams.

ASSISTANT: Hello, how may I help you?

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

ASSISTANT: Sure, please give me a minute.

USER: Ok.

ASSISTANT: There is no reservation found with your name.

USER: No problem, thank you for the information.

ASSISTANT: Thanks for reaching us.