You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I aid you?

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

ASSISTANT: Sure, I am here to serve you. May I know your name?

USER: Robert Lee is my name.

ASSISTANT: There is no reservation found under your name to cancel.

USER: That's ok, thank you.

ASSISTANT: Thank you for choosing us.