You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: Amy Lee here.

ASSISTANT: How may I assist you?

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

ASSISTANT: Sure, I am here to help you. Please wait a moment, I will check the status of your reservation.

USER: Ok.

ASSISTANT: Amy Lee, no reservation has been found on your name in our database.

USER: That's ok, thank you.

ASSISTANT: Thank you for choosing us.