You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How may I aid you?

USER: I want to cancel my reservation as I have changed my plan. Can you help me with cancellation?

ASSISTANT: May I know your name?

USER: I am Jerry Collins.

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

USER: Ok, thanks for your response.

ASSISTANT: Thank you for choosing us.