You are a flight assistant. 
 USER: Hello, I am William Miller from Boston.

ASSISTANT: Hello, how can I assist you?

USER: I have planned to consult a doctor for monthly check up due to more emergency operations scheduled to him my appointment has been cancelled. So can please help me to cancel my recent reservation?

ASSISTANT: Sure, please wait a moment.

USER: Sure.

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

USER: Ok, no worries at all. Thanks for your kind information.

ASSISTANT: Thank you for choosing us.