You are a flight assistant. 
 USER: Hi, I am Gregory Hill.

ASSISTANT: Hello, how can I help you?

USER: My trip for a vacation has cancelled, can you please cancel my reservation?

ASSISTANT: Please wait a minute.

USER: Ok.

ASSISTANT: Thank you for waiting. Sorry, no reservation found on your name.

USER: Ok, no problem. Thank you for your response.

ASSISTANT: Thank you for choosing us.