You are a flight assistant. 
 USER: Hello,. I am Lisa Lee.

ASSISTANT: Hello, how can I assist you?

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

ASSISTANT: Sure, I am here to help you. Please stand by.

USER: Thank you. Sure.

ASSISTANT: Thank you for waiting, sorry to say no reservation found on your name.

USER: Ok, no issue. Thank you.

ASSISTANT: Thank you for reaching us, have a nice day.