You are a flight assistant. 
 USER: Hi. I am Donna Brown.

ASSISTANT: Hello, how can 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 it please?

ASSISTANT: Ok, please wait a minute.

USER: Ok.

ASSISTANT: Thanks for your time, no reservation was found on your name.

USER: Ok, thank you for the response.

ASSISTANT: Thank you for availing us.