You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I assist you?

USER: I made a reservation earlier this week to give a seminar, due to some issues seminar has been cancelled. Can you please help me to cancel my recent reservation?

ASSISTANT: Sure, may I know your name?

USER: My name is David Wilson.

ASSISTANT: Sorry, there is no reservation found on your name.

USER: Ok, no issues. Thank you.

ASSISTANT: Thank you for choosing us.